U-PRO1&2 Amplifier Module
Data Sheet
U-PRO1
Content of t
Amplifier Module
his data sheet is subject to change without prior notice
2 Amplifier Modu
U-PRO
le
Table of Contents
1
Features and description ................................................................................................................. 3
2
General specifications ...................................................................................................................... 4
2.1Audio specifications ..................................................................................................................... 4
2.2Input & output loading ................................................................................................................. 5
2.3Audio input/output interfacing ..................................................................................................... 5
2.4AC Mains & thermal specification ................................................................................................. 6
2.5Auxiliary power supply specification ............................................................................................ 7
3
Audio measurements ....................................................................................................................... 8
3.1Frequency response Ch1 (LF) ....................................................................................................... 8
3.2Frequency response Ch2 (HF) ...................................................................................................... 8
3.3Total Harmonic Distortion + Noise (THD+N) Ch1 (LF) .................................................................. 9
3.4Burst power Ch1 (LF) .................................................................................................................... 9
3.5Total Harmonic Distortion + Noise (THD+N) Ch2 (HF) ............................................................... 10
3.6Noise spectrum .......................................................................................................................... 10
3.7Intermodulation Distortion (CCIF, TIM) Ch1(LF) .......................................................................... 11
3.8Intermodulation Distortion (CCIF, TIM) CH2(HF) ......................................................................... 11
3.9Cross talk & output resistance ................................................................................................... 12
3.10Output voltage vs. frequency ..................................................................................................... 12
4
Control and readout specification .................................................................................................. 13
4.1Control pins ................................................................................................................................ 13
4.2Readout pins .............................................................................................................................. 14
5
Protection features ........................................................................................................................ 15
5.1U-PRO functional blocks ............................................................................................................. 16
5.2Single Ended (SE) 2 channel amplifier ........................................................................................ 17
5.3Single Ended (SE) 1 channel amplifier ........................................................................................ 17
6
U-PRO1 and U-PRO2 connections ................................................................................................... 18
6.1Mains Power connector .............................................................................................................. 19
6.2Signal and Control connector ..................................................................................................... 19
6.3Speaker Output connector ......................................................................................................... 20
6.4DC-Supply connector .................................................................................................................. 20
7
Mechanical specifications .............................................................................................................. 21
8
Regulatory compliance .................................................................................................................. 23
8.1Safety compliance ...................................................................................................................... 23
8.2Electro Magnetic Compliance ..................................................................................................... 23
8.3ESD precautions ......................................................................................................................... 24
8.4Changes ..................................................................................................................................... 24
8.5CE marking ................................................................................................................................. 24
U-PRO1&2_Data_Sheet-1_1 Page 2 of 24
1 Features and description
Features
1 x 280W (U-PRO1) or 1 x 280W + 1 x 100W
SE (U-PRO2) amplifier channel(s) using
Pascal’s UMAC
sonic performance.
Universal mains regulated power supply with
PFC using Pascal’s UREC
technology
Auxiliary power supply for external circuitry
like DSP Front End solutions
ErP (1275/2008/EC) & Energy Star compliant
standby consumption of < 0.5W
Wake on Music ready with selectable timing
Full protection scheme
Ultra-compact size
Unmatched total system efficiency
Multiple readouts (temperature, amplifier
output voltage, clip monitor, amplifier
protect/mute, VAC)
Safety approved and verified for EMC
compliance
TM
technology for unmatched
TM
power supply
Product summary
Parameter Typical Value
Total Output power
(1% THD+N, 1kHz @ 4/8)
Total system efficiency
(SE, 250 W @ 8)
Peak output current
(CH1)
(CH2)
THD+N
(1kHz @ 1W)
Dynamic range 119 dB(A)
Idle noise 49 V(A)
Output resistance
(1kHz)
Mains input voltage 85VAC – 265VAC
Standby consumption 0.23 W
280W + 100W
88 %
25 A
10 A
0.003 %
22.5 m
Description
The U-PRO1/2 modules are 1 or 2 channel Class-D
amplifiers with integrated universal mains power
supply with PFC.
The U-PRO2 is an asymmetric 2 channel amplifier
with a high-power channel intended for LF/MF
drivers and a low-power channel intended for HF
drivers.
The U-PRO1/2 offers an ultra-compact size with an
unmatched total system efficiency to ease the
integration of the U-PRO modules into any audio
solution.
In addition, the U-PRO1/2 modules offer a number
of readouts and controls, which allow for external
DSP control of the modules. The built-in auxiliary
power supply makes it easy to supply a DSP Front
End.
Typical applications
Professional Audio Solutions
Self-Powered Loudspeakers
Consumer Audio Solutions
Hi-Fi Audio Solutions
Installation Systems
U-PRO1&2_Data_Sheet-1_1 Page 3 of 24
2 General specifications
2.1 Audio specifications
Electrical Characteristics @ Ta = 25°C (unless otherwise specified)
Symbol Parameter Conditions Min Typ Max Unit
V
Peak output voltage Ch1 & Ch2 Unloaded - ± 70 - V
out,max
I
out,peak_Ch1(LF)
I
out,peak_Ch2(HF)
P
Total module output power1
o,tot
Po
Po
Po
Po
THD+N THD+N @ 1W, 1kHz, RL = 82 0.003 %
V
noise Ch1(LF)
V
noise Ch2(HF)
DR
Ch1(LF)
DR
Ch2(HF)
A Voltage gain @ 1kHz, Ch1 & Ch2 SE - 26 - dB
A
var_Ch1(LF)
A
var_Ch2(HF)
BWup
BWup
BW
low
R
o_Ch1(LF)
R
o_Ch2(HF)
V
out,offset
IMD
CCIF_Ch1(LF)
IMD
TIM_Ch1(LF)
IMD
CCIF_Ch2(HF)
IMD
TIM_Ch2(HF)
Table 2-1: Audio specifications
Peak output current - 25 - A
Peak output current - 10 - A
280
250
245
245
280
250
175
175
110
110
66
49
66
49
117
119
117
119
0.3
0.1
0.3
0.3
0.2
0.1
85
65
100
85
65
22.5
256
35
245
- W
- W
- W
- W
- W
- V
- V
RMS
RMS
- dB
- dB
- dB
- dB
- kHz
- kHz
- m
- m
Output power @ 1% THD+N, 1kHz
Ch1(LF), single channel driven R
Output power @ 1% THD+N, 1kHz2
Ch1(LF), single channel driven RL=4
Output power @ 1% THD+N, 1kHz
Ch2(HF), single channel driven R
Output power @ 1% THD+N, 1kHz2
Ch2(HF), single channel driven R
Output idle noise - Ch1(LF)
Output idle noise – Ch2(HF)
Dynamic Range - Ch1(LF)
Dynamic Range – Ch2(HF)
Frequency response variance
Ch1(LF) @ 20Hz – 20kHz
Frequency response variance
Ch2(HF) @ 20Hz – 20kHz
Upper bandwidth @ -3dB
Ch1(LF)
Upper bandwidth @ -3dB
Ch2(HF)
Lower bandwidth @ -3dB
Ch1 & Ch2
Output resistance3
Output resistance3
2
=8
L
2
=8
L
=4
L
230VAC
120V
AC
230V
120V
AC
AC
230VAC
120VAC
230V
120V
230V
120V
AC
AC
AC
AC
Unweighted
A-weighted
Unweighted
A-weighted
Unweighted
A-weighted
Unweighted
A-weighted
-
-
-
-
-
-
-
-
-
Open Load
8
4
Open Load
16
8
RL = 8
= 4
R
L
R
= 16
L
= 8
R
L
= 4
R
L
-
-
All loads - 1.6 - Hz
1 kHz
20 kHz
1 kHz
20 kHz
-
-
Amplifier output DC Offset Ch1 or Ch2 8 - ±7 - mV
Intermodulation distortion (CCIF),
Ch1(LF)
Transient Intermodulation distortion
(TIM), Ch1(LF)
Intermodulation distortion (CCIF),
Ch2(HF)
Transient Intermodulation distortion
(TIM), Ch2(HF)
18kHz &
19kHz
- 0.006 - %
Po = 10W, 8
Po = 10W, 8 - 0.003 - %
18kHz &
19kHz
- 0.0046 - %
Po = 10W, 8
Po = 10W, 8 - 0.0028 - %
Note 1: Maximum total power is limited by the power supply.
Note 2: Measured using the Audio Precision AES-17 filter.
Note 3: Measured using “APx Output Impedance Utility” at the mating part of the output connector, thereby including contact
resistance of the connectors.
U-PRO1&2_Data_Sheet-1_1 Page 4 of 24
2.2 Input & output loading
Electrical Characteristics @ Ta = 25°C (unless otherwise specified)
Symbol Parameter Conditions Min Typ Max Unit
Z
Input impedance
INPUT
Z
L,Ch1(LF)
Z
L,Ch2(HF)
Z
L,BTL
Z
L,C
Loudspeaker nominal impedance range
Ch1(LF) Single Ended (SE)
Loudspeaker nominal impedance range
Ch2(HF) Single Ended (SE)
Loudspeaker nominal impedance range
Ch1 – Ch2 Bridge Tied Load (BTL)*
Maximum purely capacitive loading of
amplifier output
Balanced
Unbalanced
-
Ch1(LF) 41 8
Ch2(HF) 4
1
Ch1 – Ch2 * * *
- - 1 F
7.2
3.6
- k
8
Table 2-2: Input and output loading
Note 1: U-PRO is fully protected for ZL < ZL Min. Connection of loads < ZL Min is not recommended as a low load impedance in
combination with the amplifier current limit will limit maxim output power.
* Using the U-PRO2 Amplifier module in BTL mode (Bridge Tied Load) is not allowed, as the two output channels have asymmetrical
power ratings, and current limits.
2.3 Audio input/output interfacing
Electrical Characteristics @ Ta = 25°C (unless otherwise specified)
Symbol Parameter Value Unit
In+
max
In-
Absolute maximum audio input voltage ±20 Vp
max
In+
In-
Absolute maximum audio input voltage ±20 Vp
Audio input voltage (In+) – (In-)
voltage swing
for full output
max
1
V
±3.5
p
Table 2-3: Audio input voltage rating
Note 1: Internal input stage is supplied from an internal ±5V.
U-PRO1&2_Data_Sheet-1_1 Page 5 of 24
2.4 AC Mains & thermal specification
Electrical Characteristics @ Ta = 25°C (unless otherwise specified)
When values differ between U-PRO1 and U-PRO2, U-PRO2 data is added in parentheses.
Symbol Parameter Conditions Min Typ Max Unit
VAC Range Operational voltage range 45Hz - 65Hz 85 - 265 VAC
P
120VAC NS
P
230VAC NS
P
120VAC NS
P
230VAC NS
P
AC_PN
P
AC_PN
P
AC_PN
P
AC_PN
P
AC_PN
P
AC_PN
P
Loss
P
Loss
P
Loss
P
Loss
P
Loss
P
Loss
Mains power input
No signal applied
Pascal U-PRO I/O-board attached
Mains power input
No signal applied
Pascal U-PRO I/O-board attached
Mains power input
No signal applied
Mains power input
No signal applied
Mains power input 230V
U-PRO1. Pink Noise
= 1/8th 250W for RL = 8
P
out,RMS
= 1/8th 280W for RL = 4
P
out,RMS
Mains power input 120V
U-PRO1. Pink Noise
= 1/8th 250W for RL = 8
P
out,RMS
= 1/8th 250W for RL = 4
P
out,RMS
AC
AC
Mains power input 100VAC
U-PRO1. Pink Noise
= 1/8th 250W for RL = 8
P
out,RMS
P
= 1/8th 250W for RL = 4
out,RMS
Mains power input 230V
, U-PRO2,
AC
Pink Noise, Load Ch1: 4 / Ch2: 16
P
P
Mains power input 120V
ch1 = 1/8th 224W @ 4
out,RMS
ch2= 1/8th 56W @16
out,RMS
, U-PRO2,
AC
Pink Noise, Load Ch1: 4 / Ch2: 16
P
P
Mains power input 100V
ch1 = 1/8th 200W @ 4
out,RMS
ch2= 1/8th 50W @16
out,RMS
, U-PRO2,
AC
Pink Noise, Load Ch1: 4 / Ch2: 16
P
P
Module power loss at 230V
ch1 = 1/8th 200W @ 4
out,RMS
ch2= 1/8th 50W @16
out,RMS
AC
U-PRO1. Pink Noise
= 1/8th 250W for RL = 8
P
out,RMS
= 1/8th 280W for RL = 4
P
out,RMS
Module power loss at 120V
AC
U-PRO1. Pink Noise
= 1/8th 250W for RL = 8
P
out,RMS
P
= 1/8th 280W for RL = 4
out,RMS
Module power loss at 100V
AC
U-PRO1. Pink Noise
= 1/8th 250W for RL = 8
P
out,RMS
= 1/8th 280W for RL = 4
P
out,RMS
Mains power input U-PRO2, Pink
Noise, Load Ch1: 4 / Ch2: 16
P
= 1/8th 200W for RL = 4
out,RMS
= 1/8th 50W for RL = 16
P
out,RMS
Mains power input U-PRO2, Pink
Noise, Load Ch1: 4 / Ch2: 16
P
= 1/8th 200W for RL = 4
out,RMS
= 1/8th 50W for RL = 16
P
out,RMS
Mains power input U-PRO2, Pink
Noise, Load Ch1: 4 / Ch2: 16
= 1/8th 200W for RL = 4
P
out,RMS
P
= 1/8th 50W for RL = 16
out,RMS
Standby
Mute
Idle
Standby
Mute
Idle
Standby
Mute
Idle
Standby
Mute
Idle
R
= 8
L
RL = 4
= 8
R
L
= 4
R
L
R
= 8
L
= 4
R
L
230V
- 67 - W
AC
120V
- 68 - W
AC
100V
- 68 - W
AC
R
= 8
L
= 4
R
L
R
= 8
L
= 4
R
L
R
= 8
L
RL = 4
230V
17 W
AC
120V
15 W
AC
100V
15 W
AC
-
-
-
-
0.37
3.8 (4.4)
4.4 (6.1)
0.45
4.1 (4.5)
4.9 (6.8)
0.17
2.4 (2.9)
3.6 (5.3)
0.24
2.6 (3.0)
4.1 (5.9)
44
50
43
46
43
46
11
15
10
13
10
13
W
W
W
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
RMS
-
-
-
- W
- W
- W
- W
- W
W
W
U-PRO1&2_Data_Sheet-1_1 Page 6 of 24
tot,8
tot,4
PF8
PF4
TSD
System efficiency @ 1 x 8 Ch1(LF)
U-PRO1, (1x250W
@ 1kHz)
out
System efficiency @ 1 x 4 Ch1(LF)
U-PRO1, (1x250W
@ 1kHz)
out
Power Factor @ 1 x 8 Ch1(LF) UPRO1, (1x100W
@ 1kHz)
out
Power Factor @ 1 x 4 Ch1(LF) UPRO1, (1x100W
@ 1kHz)
out
Temperature @ thermal shutdown
Thermal hysteresis = 5°C1
230VAC
120VAC
230V
AC
120V
AC
230VAC
120VAC
230V
AC
120V
AC
-
-
-
-
88
84
84
82
0.92
0.97
0.92
0.97
- %
- %
-
-
- 85 - °C
Table 2-4: AC Mains & thermal specifications
Note 1: 5°C but minimum 10s.
2.5 Auxiliary power supply specification
Electrical Characteristics @ Ta = 25°C (unless otherwise specified)
Symbol Parameter Conditions Min Typ Max Unit
V
+7.5V voltage
+7.5V
V
+15V voltage 15.5 V
+15V
V
-15V voltage -15.5 V
-15V
V
Drive
I
+7.5V current rating2 0 800 mA
+7.5V
I
+15V current rating2 0 250 mA
+15V
I
-15V current rating2 -250 0 mA
-15V
I
V
VDrive
P
Maximum total output power2 0 9 W
tot
Vdrive voltage Ref. to -70V 12.4 V
current rating2 0 200 mA
Drive
Table 2-5: Auxiliary power supply specification
7.7 V
Note 1: For details see U-PRO Application Manual covering Powered Speaker
Note 2: The Auxiliary power supply cannot be loaded with the maximum rated load current for all four outputs simultaneously as this
will violate the 9 Watt total output power limit. Use the typical Voltage levels from Table 2-5 in combination with the actual load
currents to calculate the total power consumption. The calculated total power consumption must comply with the 9 Watt total output
power limit.
U-PRO1&2_Data_Sheet-1_1 Page 7 of 24
3 Audio measurements
3.1 Frequency response Ch1 (LF)
+32
+30.8
+29.6
+28.4
+27.2
d
B
+26
g
A
+24.8
+23.6
+22.4
+21.2
+20
20 100k 50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
Figure 3-1: Frequency response (Top curves: Amplitude, Bottom curves: Phase)
4 (green), 8 (red) and Open Load (blue)
+180
+160
+140
+120
+100
+80
+60
+40
+20
+0
-20
-40
-60
-80
d
e
g
3.2 Frequency response Ch2 (HF)
+32
+30.8
+29.6
+28.4
+27.2
d
B
+26
g
A
+24.8
+23.6
+22.4
+21.2
+20
20 100k 50 100 200 500 1k 2k 5k 10k 20k 50k
Hz
Figure 3-2: Frequency response (op curves: Amplitude, Bottom curves: Phase)
4 (green), 8 (red) and Open Load (blue)
+180
+160
+140
+120
+100
+80
+60
+40
+20
+0
-20
-40
-60
-80
d
e
g
U-PRO1&2_Data_Sheet-1_1 Page 8 of 24
3.3 Total Harmonic Distortion + Noise (THD+N) Ch1 (LF)
10
5
2
1
0. 5
0. 2
0. 1
%
0. 05
0. 02
0. 01
0. 005
0. 002
0. 001
100m 300 200m 500m 1 2 5 10 20 50 100
W
Figure 3-3 THD+N vs. Power @ 4, 230VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
10
5
2
1
0. 5
0. 2
0. 1
%
0.05
0.02
0.01
0. 005
0. 002
0. 001
100m 300 200m 500m 1 2 5 10 20 50 100
W
Figure 3-5 THD+N vs. Power @ 4, 120VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
10
5
2
1
0. 5
0. 2
0. 1
%
0. 05
0. 02
0. 01
0. 005
0. 002
0. 001
100m 300 200m 500m 1 2 5 10 20 50 100
W
Figure 3-4 THD+N vs. Power @ 8, 230VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
10
5
2
1
0. 5
0. 2
0. 1
%
0. 05
0. 02
0. 01
0. 005
0. 002
0. 001
100m 300 200m 500m 1 2 5 10 20 50 100
Figure 3-6 THD+N vs. Power @ 8, 120VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
W
3.4 Burst power Ch1 (LF)
Figure 3-7: Burst power Ch1 (LF) @ 4, 1kHz
Note: 2 x 10,000uF can optionally be connected to CON703 externally to stabilize the +/-70V supply.
U-PRO1&2_Data_Sheet-1_1 Page 9 of 24
3.5 Total Harmonic Distortion + Noise (THD+N) Ch2 (HF)
1
0. 5
0. 2
0. 1
0. 05
%
0. 02
0. 01
0. 005
0. 002
0. 001
100m 100 200m 500m 1 2 5 10 20 50
W
Figure 3-8: THD+N vs. Power@ 4, 230VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
1
0. 5
0. 2
0. 1
0. 05
%
0. 02
0. 01
0.005
0.002
0.001
100m 100 200m 500m 1 2 5 10 20 50
W
Figure 3-10: THD+N vs. Power@ 4, 120VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
1
0. 5
0. 2
0. 1
0. 05
%
0. 02
0. 01
0. 005
0. 002
0. 001
100m 200 200m 500m 1 2 5 10 20 50 100
W
Figure 3-9: THD+N vs. Power @ 8, 230VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
1
0.5
0.2
0.1
0. 05
%
0. 02
0. 01
0.005
0.002
0.001
100m 200 200m 500m 1 2 5 10 20 50 100
W
Figure 3-11: THD+N vs. Power @ 8, 120VAC
100Hz (green), 1kHz (red), 6.67kHz (blue)
3.6 Noise spectrum
+0
-10
-20
-30
-40
-50
-60
d
-70
B
-80
r
-90
A
-100
-110
-120
-130
-140
-150
-160
2k 20k 4k 6k 8k 10k 12k 14k 16k 18k
Figure 3-12: FFT idle - 8
Channel 1 (blue) & Channel 2 (red)
Hz
+0
-10
-20
-30
-40
-50
-60
d
-70
B
-80
r
-90
B
-100
-110
-120
-130
-140
-150
-160
U-PRO1&2_Data_Sheet-1_1 Page 10 of 24
3.7 Intermodulation Distortion (CCIF, TIM) Ch1(LF)
1
0. 5
0. 2
0. 1
0. 05
0. 02
0. 01
%
0. 005
0. 002
0. 001
0. 0005
0. 0002
0. 0001
100m 300 200m 500m 1 2 5 10 20 50 100
Figure 3-13: CCIF vs. Power - R
W
=4
L
Ch1(LF), f1=18kHz, f2 =19kHz
10
5
2
1
0. 5
0. 2
0. 1
%
0. 05
0. 02
0. 01
0. 005
0. 002
0. 001
100m 300 200m 500m 1 2 5 10 20 50 100
Figure 3-15: TIM vs. Power - R
Ch1(LF)
W
=4
L
1
0.5
0.2
0.1
0.05
0.02
0.01
%
0.005
0.002
0.001
0.0005
0.0002
0.0001
100m 200 200m 500m 1 2 5 10 20 50 100
Figure 3-14: CCIF vs. Power - R
W
=8
L
Ch1(LF), f1=18khz, f2 =19khz
10
5
2
1
0.5
0.2
0.1
%
0.05
0.02
0.01
0.005
0.002
0.001
100m 300 200m 500m 1 2 5 10 20 50 100
Figure 3-16: TIM vs. Power - R
W
=8
L
Ch1(LF)
3.8 Intermodulation Distortion (CCIF, TIM) CH2(HF)
1
0.5
0.2
0.1
0.05
0.02
0.01
%
0.005
0.002
0.001
0.0005
0.0002
0.0001
W
Figure 3-17 CCIF vs. Power - R
Ch2(HF), f1=18kHz, f2 =19kHz
10
5
2
1
0.5
0.2
0.1
%
0.05
0.02
0.01
0.005
0.002
0.001
W
=4
L
60
100
1
0.5
0.2
0.1
0.05
0.02
0.01
%
0.005
0.002
0.001
0.0005
0.0002
0.0001
W
Figure 3-18 CCIF vs. Power - RL=8
Ch2(HF), f1=18khz, f2 =19khz
10
5
2
1
0.5
0.2
0.1
%
0.05
0.02
0.01
0.005
0.002
0.001
W
100
100
Figure 3-19 TIM vs. Power - RL=4
Ch2(HF)
Figure 3-20 TIM vs. Power - RL=8
Ch2(HF)
U-PRO1&2_Data_Sheet-1_1 Page 11 of 24
3.9 Cross talk & output resistance
Outputresistance
Ch1 Ch2
)
0,1
OHM
(m
OUT
R
0,01
20 200 2000 20000
FREQUENCY(Hz)
Figure 3-21: Output resistance1 – Measurement made at the mating part of the output connector. Connector
resistance thereby included. Ch1(LF) (red), Ch2(HF) (blue)
Note 1: Measured using “APx Output Impedance Utility” at the mating part of the output connector, thereby including contact
resistance of the connectors.
+0
-10
-20
-30
-40
-50
-60
d
-70
B
-80
-90
-100
-110
-120
-130
-140
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 3-22: Cross talk - Ch.1 @ Po,ch2=50W 8 (red), Ch.2 @ Po,ch1=50W 8 (blue)
3.10 Output voltage vs. frequency
Figure 3-23: Max Vout vs. frequency vs. time
U-PRO1&2_Data_Sheet-1_1 Page 12 of 24
4 Control and readout specification
4.1 Control pins
ۻܝܜ܍ത – When muting the U-PRO1/U-PRO2 module, the amplifier outputs will be disabled. It typically takes
0.5ms to disable and only 1ms to enable the amplifier.
The mute function may be used with an external wake-on-music circuit to lower the mains power
consumption when the module is unused, but still with the module ready to play in typically 1ms – making
it unnoticeable for the user.
ത
܁ܜ܉ܖ܌܊ܡ
minimum. In standby it is possible to comply with the ErP directive (1275/2008/EC) & Energy Star
specification with a total power consumption of less than 0.5W. This includes a current draw of up to 25
mA on the +7.5V supply for external standby control circuitry.
Signal_Present – This signal is part of the “Wake on Music” function built into the U-PRO1/U-PRO2
module. If left open the signal is internally pulled high and “Wake on Music” is not used. If pulled low
continuously for a selectable amount of time set by the “Signal Time Out Select” the amplifiers will first
be muted to save power but are still able to be un-muted within 1ms. If signal present continues to be low
the U-PRO1/U-PRO2 module will enter standby mode. The U-PRO1/U-PRO2 module exits standby mode as
soon as the signal present signal is released and is ready within typically 660ms.
A suitable circuit for sensing the audio with a sensitivity of 4mV
can be found in the U-PRO Series Application Manual.
Signal_TimeOut – This signal is part of the “Wake on Music” function built into the U-PRO1/U-PRO2
module. Placing a resistor from this pin to GND makes it possible to choose between 3 different timing
settings. See the U-PRO Series Application Manual for details.
T-V_Sel/SMPS_OL – This pin can be either an input or an output depending on the selected timing
resistor connected to Signal_TimeOut (pin 14) described above. In the Temp/VAC mode, it will be an input
pin – possible to toggle – allowing to read out either the mains voltage or amplifier temperature in realtime. In the Low Rail mode, it is an output pin indicating whether the (+/-70V) rail voltages are below +/50V, or not – useful for a Front End circuit to activate a limiter that prevents the rail voltages from being
pulled below the level where sound will disappear temporarily.
– With the U-PRO1/U-PRO2 module in standby the mains power consumption is put to a
and controlling the Signal Present pin
rms
U-PRO1&2_Data_Sheet-1_1 Page 13 of 24
4.2 Readout pins
The U-PRO1/U-PRO2 module has various readouts to monitor the state of the module.
Temp/VAC_Out – Amplifier temperature or mains voltage readout; by toggling a control-pin, either mains
voltage, or amplifier temperature can be read real-time.
Amplifier temperature – The output stage temperature from 0-100° is expressed as a DC voltage
from 0-3.3V. When the module enters thermal protection at 85°C, equivalent to 2.805V, the
voltage will jump to 3.3 V indicating thermal protection is active. This makes it possible to both
read the live temperature and read when the module is disabled due to thermal protection. The
module exits thermal protection when the temperature drops below 80°C and the voltage will
return to a live readout of the actual maximum temperature.
Mains voltage – The AC mains voltage from 85-265V
to 2.925V. This readout may be used to adjust external limiters to match the mains voltage
dependent output power.
Amplifier Output Voltage readout – There are two amplifier output voltage readouts
Vout_Monitor_Ch1 and Vout_Monitor_Ch2, one for each channel. These readouts are voltage divisions of
the output signals in the range of ±10 Vp corresponding to ±70Vp at the output.
is expressed as a DC voltage from 0.213V
AC
ത
Amplifier Clip readout – There is one amplifier clip readout, Clip_1
collector output. The readout pin will be pulled low if the (audio) output voltage for Ch1 becomes too high
compared to the internal rail voltages (Voltage Clipping), or if the Ch1 amplifier reaches internal current
protection. This readout may be used for signal clip/limiting indications. There is no voltage clip readout
for Ch2 since this is an HF channel not normally clipped and if clipped the distortion is less obvious.
Current clipping on a HF driver is not normally reached but in case current clipping on Ch2 occurs, this
ത
event is shown as clip on the Ch1 clip readout - Clip_1
ത
۲ܑܛ_܀܍܉܌/۾ܚܗܜ܍܋ܜ
either muted or has entered an internal protection.
– This readout is an open-collector output which will be pulled low when the module is
.
only. This readout is an open-
U-PRO1&2_Data_Sheet-1_1 Page 14 of 24
5 Protection features
The U-PRO1/U-PRO2 has built-in protection features to protect the amplifier module against abuse and/or
extreme use scenarios, and to protect the speaker drivers from being damaged in case of a malfunction.
Temperature – Temperature protection of the power supply and amplifiers is implemented to prevent
the module from thermal runaway. When thermal protection is engaged both amplifiers are muted until
the temperature has dropped 5°C, or for a minimum of 10s.
Over Current – If an amplifier output is shorted or reaches its current limit, the clip readout will be
activated to allow an external limiter/DSP to limit the input signal. If the limiter is not capable of limiting
the signal, the module will enter over-current protection and mute the amplifier output(s) until the
internal protection timing allows the module to re-enable the amplifier(s).
DC Protection – If DC-voltage is detected at one of the amplifier outputs, the U-PRO1/U-PRO2 mutes the
outputs. If DC still is present after 3 cycles, the U-PRO1/U-PRO2 DC protection circuit switches off the +/70V power supply. Resetting of the latched protection circuit requires cycling of the AC mains.
HF Protection – A high frequency protection is implemented to protect the amplifier output filter
components from overload – refer to Figure 3-23. If a high frequency (and high amplitude) signal is
present for a longer period of time, the module will enter HF protection and mute (both) amplifier
output(s) until the internal protection timing allows the module to re-enable the amplifier(s).
U-PRO1&2_Data_Sheet-1_1 Page 15 of 24
5.1 U-PRO functional blocks
Figure 5-1: Block diagram showing U-PRO2 module functionality. For U-PRO: Channel 2 circuitry is eliminated
U-PRO1&2_Data_Sheet-1_1 Page 16 of 24
5.2 Single Ended (SE) 2 channel amplifier
The U-PRO2 Amplifier module consists of two (SE) single ended output channels, with channel 1 handling
LF signals and channel 2 handling HF signals. This module is suitable for driving a woofer and a tweeter in
an active two-way speaker.
Audio
input 1
Audio
input 2
Single Ended Source
Front-end
Analog or digital
signal processing
circuit
GND
Out+ Ch 1
GND Ch1
GND GND
Out+ Ch 2
GND Ch2
Vin+ Ch1
Vin- C h1
Vin+ Ch2
Vin- C h2
AGND
1x
GND
1x
GND
U-PRO2 Input & Output
+5V
1k8
1n01n 0
GND
1k8
GND
-5V
+5V
1k8
1n01n0
GND
1k8
GND
-5V
330p
2k0
1k8
1k8
2k0
AGND
330p
2k0
1k8
1k8
2k0
AGND
1k0
1k0
330p
330p
1M6
AGND
AGND
1k0
1k0
1M6
AGND
AGND
ST702
4
3
2
1
4-8 Ohm
4-8 Ohm
Figure 5-2: U-PRO2 Amplifier module with Single Ended (SE) outputs connected to woofer (LF) and tweeter (HF)
5.3 Single Ended (SE) 1 channel amplifier
The U-PRO1 Amplifier module consists of one (SE) single ended output channel. This module is suitable for
Hi-Fi or studio subwoofers, musical instrument amplifiers, bass amplifier heads etc.
Single Ended Source
Front-end
Audio
input 1
Analog or digital
signal processing
circuit
1x
GND
GND
Out+ Ch 1
GND Ch1
GND GND
Vin+ Ch1
Vin- C h1
AGND
Figure 5-3: U-PRO1 Amplifier module with Single Ended (SE) output connected to a subwoofer (LF)
U-PRO1 Input & Output
+5V
1k8
1n01n0
GND
1k8
GND
-5V
330p
2k0
1k8
1k8
2k0
AGND
1k0
1k0
AGND
1M6
AGND
ST702
4
3
NC
NC
2
1
330p
4-8 Ohm
U-PRO1&2_Data_Sheet-1_1 Page 17 of 24
6 U-PRO1 and U-PRO2 connections
This section describes the signal, control and DC-supply connections for the U-PRO modules.
Figure 6-1: U-PRO1 Amplifier module connectors – red circle indicates pin 1
Figure 6-2: U-PRO2 Amplifier module connectors – red circle indicates pin 1
U-PRO1&2_Data_Sheet-1_1 Page 18 of 24
6.1 Mains Power connector
CON700
Name Pin # I/O
L 1 I The mains input Live/Line wire must be connected to this terminal.
N 2 I The mains input Neutral wire must be connected to this terminal.
Table 6-1: U-PRO Mains connector
Description
6.2 Signal and Control connector
CON701
Name Pin # I/O
Ch1_In- 1 I
Ch1_In+ 2 I
GND 3 -
Ch2_In- 4 I1
Ch2_In+ 5 I1
Temp/Vac_Out 6 O
Vout_Monitor_Ch1 7 O
Vout_Monitor_Ch2 8 O1
Clıp_1ത
No_Connect 10 - This pin has no internal connection.
Dıs_Read/Protectത
Signal_Present 12 -
Muteത
Signal_TimeOut 14 I
T-V_Sel/SMPS_OL 15 I/O
9 O
11 O
13 I
Ch 1 (LF) negative signal of the balanced audio input to the U-PRO1/UPRO2 module. The maximum allowable signal on this pin is ±20Vp.
Ch 1 (LF) positive signal of the balanced audio input to the U-PRO1/UPRO2 module. The maximum allowable signal on this pin is ±20V
This pin is a general-purpose GND. Shall be connected to Front End
ground plane.
Ch 2 (HF) negative audio input signal of the balanced input to the UPRO2 module. The maximum allowable signal on this pin is ±20Vp.
Ch 2 (HF) positive audio input signal of the balanced input to the UPRO2 module. The maximum allowable signal on this pin is ±20V
This pin reads out by default, the highest temperature of the two
amplifier channels or the +/-70V power supply rectifier diodes in the
range of 0-3.3V corresponding to 0°C-100°C. The pin will read out 3.3V
when in temperature protection.
This pin can alternatively be used to read out the AC mains voltage
from 85-265V
Temp/VAC_Set via pin 15 is used to select either temperature (default)
or AC mains readout.
This pin reads out the amplifier channel 1 output voltage. The signal
will be in the range ±10V
the amplifier. The signal has a high impedance and requires a buffer if
used.
This pin reads out the amplifier channel 2 output voltage. The signal
will be in the range ±10Vp corresponding to ±70Vp on the output of
the amplifier. The signal has a high impedance and requires a buffer if
used.
This pin signals an active low whenever the amplifier Ch1(LF) is
voltage clipping or current clipping or when Ch2(HF) is current
clipping. Note there is no indication if Ch2(HF) is voltage clipping.
This pin signals an active low whenever the amplifier channel 1 and
channel 2 are disabled or in protection.
This signal is part of the “Wake on Music” function built into the U-PRO
series modules. If left open the signal is internally pulled high and
“Wake on Music” is not used. If pulled low continuously for a
selectable amount of time set by the “Signal Time Out Select” the
amplifier(s) will first mute to save power but still be able to un-mute
within 1ms. If the signal present continues to be low the U-PRO series
module will enter standby mode. The U-PRO series module exits
standby mode as soon as the signal present signal is released and is
ready within typically 660ms.
An open-collector must be used to actively pull this pin low whenever
the module must disable/Mute
within (typically) 1 ms.
3 different power safe mode timings can be selected by connecting a
resistor of a specified value from the Signal_TimeOut pin to GND. See
Table 6-3
Signal Present input is not used the Signal_TimeOut pin can be left
unconnected.
This pin can be either an input or an output depending on the selected
timing resistor connected to Signal_TimeOut (pin 14).
is expressed as a DC voltage from 0.213V to 2.925V.
AC
corresponding to ±70Vp on the output of
p
ത
for a list of resistor values and corresponding timings. If the
. When released the module is ready
.
p
.
p
U-PRO1&2_Data_Sheet-1_1 Page 19 of 24
If timing resistor T1, T2 or T3 is selected (see
input pin where it is possible to select either temperature or AC mains
readout for the signal Temp/Vac_Mon (pin 6). If pin 15 is left unconnected, the internal pull-up will by default select temperature as
the read out on pin 6. If pin 15 is actively pulled low by an opencollector, the mains RMS voltage will be the read out on pin 6.
If timing resistor T1(Low Rail), T2(Low Rail) or T3(Low Rail) is selected
Table 6-3
(see
70V) the rail voltage is below +/-50V.
An open-collector must be used to actively pull this pin low whenever
Standbyത
+7.5V 17,18 O This pin may be used to supply external circuitry.
GND 19,20 - This pin is the +7.5V ground return.
+15V 21,22 O This pin may be used to supply external circuitry.
GND 23,24 - This pin is the ±15V ground return.
-15V 25,26 O This pin may be used to supply external circuitry.
Table 6-2: U-PRO signal and control connector
Note 1: For U-PRO1 these pins have no internal connection
16 I/O
the module must enter standby mode. When released the module is
ready within a few seconds.
) it will be an output pin that indicates whether the (+/-
Table 6-3
) it will be an
It is possible to select one of 3 different Mute/Standby timings by connecting a resistor of a
specified value between Signal_TimeOut (pin 14) and a GND pin. See Table 6-3 to select a
resistor value that corresponds with the standby time you want.
Timing ID Resistor (Ω) Mute time Standby time T-V_Sel/SMPS_OL function
T1 150K 2 min mute 10 min standby Input – Temp/VAC selection
T2 100k 10 min mute Never enters standby mode Input – Temp/VAC selection
T3 68k 10 min mute 25 min standby Input – Temp/VAC selection
T1(Low Rail) 47K 2 min mute 10 min standby Output – Low Rail indication
T2(Low Rail) 33K 10 min mute Never enters standby mode Output – Low Rail indication
T3(Low Rail) 24K 10 min mute 25 min standby Output – Low Rail indication
Table 6-3: Mute/Standby timing and Temp–VAC/Low Rail indication resistor selection
6.3 Speaker Output connector
CON702
Name Pin # I/O
Ch2_Out- 1 O1 This pin is used for the GND signal of the channel 2 speaker.
Ch2_Out+ 2 O1 The amplified speaker signal of channel 2 is available on this pin.
Ch1_Out- 3 O This pin is used for the GND signal of the channel 1 speaker.
Ch1_Out+ 4 O The amplified speaker signal of channel 1 is available on this pin.
Table 6-4 U-PRO speaker connector overview
Note 1: For U-PRO1 these pins have no internal connection
Description
6.4 DC-Supply connector
CON703
Name Pin # I/O
-70V 1 O
V
2 O The V
drive
+70V 3 O
Table 6-5 U-PRO’s U-A Series Extension Module connector overview
The negative rail voltage for U-A Series Extension Module is available on
this pin.
voltage for U-A Series Extension Module is available on this pin.
drive
The positive rail voltage for U-A Series Extension Module is available on
this pin.
Description
U-PRO1&2_Data_Sheet-1_1 Page 20 of 24
7 Mechanical specifications
This section contains mechanical outlines and specifications of the U-PRO1 and U-PRO2 module.
Item Min Typical Max
(A) Top side components - 31.75mm 32.50mm
(B) PCB 1.50mm 1.60mm 1.70mm
(C) Heat transferring bar 3.95mm 4.00mm 4.05mm
Module weight (inclusive heat transferring bar)
Table 7-1: U-PRO1 and U-PRO2 mechanical specifications
U-PRO1 220g
U-PRO2 229g
Figure 7-1: Mechanical outline and specifications for the U-PRO1 module
U-PRO1&2_Data_Sheet-1_1 Page 21 of 24
Figure 7-2: Mechanical specifications for U-PRO2 module
U-PRO1&2_Data_Sheet-1_1 Page 22 of 24
8 Regulatory compliance
8.1 Safety compliance
Safety Standards:
The U-PRO series is safety tested according to the following standards:
IEC/EN 60065:2001(7
IEC/EN/UL 62368-1:2014 (2
The U-PRO series fulfills the requirements of:
EN 60065:2002 + A1:2006 + A11:2008 + A2:2010 + A12:2011
EN 62368-1:2014
CSA C22.2 NO. 62368-1-14:2014
UL 62368:2014
The U-PRO series is evaluated against and complies with the regulations of the following countries:
60065 AR, AT, AU, BE, BY, CA, CH, CN, CZ, DE, DK, ES, EU, FI, FR, GB, GR, HU, IE, IT, JP, KR, MY, NL,
NO, NZ, PL, PT, RO, SE, SG, SI, SK, UA, US
62368-1 CA, DK, FI, DE, IE, IT, NO, SE, GB, US, CENELEC common modifications
(Countries outside the CB Scheme membership may also accept the reports.)
Test procedure:
60065 U-PRO CB certificate no. E470499-A6. (UL International Demko A/S)
th
E) + A1:2005 + A2:2010
nd
E)
62368-1 U-PRO CB certificate no. E470499-D1 (UL International Demko A/S)
UL recognized under file no. E470499
(Full reports are available for download on Pascal Extranet)
Product safety category:
Class II (Not earthed equipment)
Special Notice:
The U-PRO series are tested as components – the final product should always be evaluated against
applicable standards.
8.2 Electro Magnetic Compliance
Pascal amplifier modules are EMI compliance tested according to the following standards:
Emission:
EN 55032:2012 with EN 55032:2012 AC 2013
EN 61000-3-2:2014
EN 61000-3-3:2013
Immunity:
EN 55103-2:2009
FCC part 15 subpart B
Special Notice:
EMI verification measurements of the final product should be carried out in order to secure compliance of
the final product.
U-PRO1&2_Data_Sheet-1_1 Page 23 of 24
8.3 ESD precautions
In order to retain the right to Pascal warranty on products, precautions on ESD must be taken when
handling Pascal products. Handling of Pascal products should comply with the following standards:
IEC 61340-5-2: Protection of electronic devices from electrostatic phenomena. User Guide.
IEC 61340-5-1: Protection of electronic devices from electrostatic phenomena. General. Requirements.
ANSI/ESD-S20.20: Protection of Electrical and Electronic Parts, Assemblies and
Equipment.
8.4 Changes
Pascal Products are continuously undergoing smaller changes to improve the performance or to comply
with manufacturing and quality requirements. Therefore, specifications in this data sheet are subject to
change.
8.5 CE marking
See EC Declaration of Conformity, available from www.pascal-audio.com/extranet
For further information:
www.pascal-audio.com
Or contact us at:
Info@pascal-audio.com
Phone: +45 3699 1944
Pascal A/S
Ellekaer 6
2730 Herlev
Denmark
U-PRO1&2_Data_Sheet-1_1 Page 24 of 24
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