TAOS TPS5904A, TPS5904 Datasheet



TPS5904, TPS5904A

OPTOISOLATED FEEDBACK AMPLIFIERS



TAOS017 – SEPTEMBER 1999

 Precision Programmable Reference (2.5 V)

and an Optocoupler in a Single Package

 Reference Voltage Tolerance

– TPS5904 0.8%
– TPS5904A 0.5%

 Controlled Optocoupler CTRs:

DCS OR P PACKAGE

(TOP VIEW)

LED

COMP

GND

FB

1
2
3
4

NC

8

C

7

E

6

NC

5

– TPS5904 100% to 400%
– TPS5904A 150% to 300%

NC – No internal connection

 High Withstand Voltage (WTV), 7500 V Peak

for 1 Minute

 Safety Regulatory Approvals Pending

– UL
– FIMKO, SEMKO, NEMKO, DEMKO

– EN60065/IEC 65
– EN60950/IEC 950

– VDE 0884, Level 4 (6000-V Insulation)

Description

The TPS5904 and TPS5904A optoisolated feedback amplifiers consist of a precision programmable reference
and an optocoupler. Reference-voltage tolerance for the TPS5904 is 0.8%, and for the TPS5904A is 0.5%.
These devices are primarily intended for use as the error-amplifier/reference/isolation-amplifier element in
isolated ac-to-dc power supplies and dc/dc converters. The optocoupler is a gallium-arsenide (GaAs)
light-emitting diode that emits at a wavelength of 940 nm, combined with a silicon phototransistor. The current
transfer ratio (CTR) ranges from 100% to 400% in the standard version. The TPS5904A version with a
150%-to-300% CTR is available for higher-performance applications. When using the TPS5904 or TPS5904A,
power supply designers can reduce component count and save space in tightly packaged designs. The
tight-tolerance reference eliminates the need for adjustments in many applications.

The TPS5904 and TPS5904A are characterized for operation from –40°C to 100°C and each device is supplied
in an 8-pin DIP or in an 8-pin gull-wing surface-mount package (DCS).

Typical Application

+

V

O

R1

R2

Copyright  2000, TAOS Inc.

V

I

TPS5904: Reference-voltage tolerance, 0.8%
CTR Range, 100% to 400%
TPS5904A: Reference-voltage tolerance, 0.5%
CTR Range, 150% to 300%

www.taosinc.com

+

PWM

Control

TPS5904/A

7

6



1

2
4

3

Texas Advanced Optoelectronic Solutions Inc.

800 Jupiter Road, Suite 205  Plano, TX 75074  [phone]



1

TPS5904, TPS5904A
OPTOISOLATED FEEDBACK AMPLIFIERS

TAOS017 – SEPTEMBER 1999

Functional Block Diagram

1

LED

FB

GND

2
4

3

COMP

Terminal Functions

TERMINAL

NAME NO.

C 7 Phototransistor collector
COMP 2 O Light-emitting diode and TL431 cathodes
E 6 Phototransistor emitter
FB 4 I Feedback
GND 3 Ground
LED 1 I Light-emitting diode anode
NC 5, 8 No connection

I/O DESCRIPTION

7

C

6

E

Absolute Maximum Ratings at 25°C free-air temperature (unless otherwise noted)

Input power dissipation at (or below) T
Input LED current, I
Input LED voltage, V

50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I(LED)

37 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I(LED)

= 25°C (see Note 1) 250 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

†

Input diode reverse voltage 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output power dissipation at (or below) T

= 25°C (see Note 2) 150 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

Output collector-to-emitter voltage 35 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output emitter-to-collector voltage 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output collector current 50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total continuous power dissipation at (or below) T

= 25°C (see Note 3) 350 mW. . . . . . . . . . . . . . . . . . . . . . .

A

Operating free-air temperature range, TA –40°C to 100°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

–55°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

Total input-to-output voltage 7.5 kV peak or dc (5.3 kVrms). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flammability (see Note 4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. Derate linearly from 25°C at a rate of 2.95 mW/°C.

2. Derate linearly from 25°C at a rate of 1.76 mW/° C.

3. Derate linearly from 25°C at a rate of 4.12 mW/° C.

4. Optocoupler total-package flame retardancy is tested to IEC695-2-2 using a flame application time of 30 seconds. Outer mold
compound is verified to meet UL 94V-0.



2



www.taosinc.com

OPTOISOLATED FEEDBACK AMPLIFIERS

O(COMP)

)

(

)

V

O(COMP)

V

I(FB)

I

I(LED)

O(COMP)

)

(

)

V

O(COMP)

V

I(FB)

I

I(LED)

Electrical Characteristics, TA = 25°C (unless otherwise noted)

Input

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

F

I

R

V

ref

V

ref(dev)

∆V

ref

∆V

I(LED)

I

I(FB)

I

ref(dev)

I

DRV(min)

I

I(off)

†

|Zka|

†

This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology.

Light-emitting diode forward voltage
Light-emitting diode reverse current VR = 6 V 10 µΑ

Reference voltage

TPS5904
TPS5904A

Deviation of reference voltage over
temperature

Ratio of reference voltage change-to­change in input light-emitting-diode voltage

Feedback input current
Deviation of reference input current over

temperature
Minimum drive current V

Off-state input light-emitting-diode current

Regulator output impedance

V
See Figure 1

V
See Figure 1

V
TA = 25°C to 100°C, See Figure 1

∆V
See Figure 2

I

I(LED)

See Figure 3
I

I(LED)

TA = 25°C to 100°C, See Figure 3

V
See Figure 4

V
I

O(COMP)

= V

= V

=

= V

I(FB)

I(FB

I(FB)

,I

,I

,

,I

I(LED)

I

I(LED)

I(LED)

O(COMP)

O(COMP)

= 4 V to 37 V, I

I(LED)

= 10 mA, R3 = 10 kΩ ,

= 10 mA, R3 = 10 kΩ,

= V

O(COMP)

= 37 V, V

I(LED)

O(COMP)

, See Figure 1 0.45 1 mA

I(FB)

I(FB)

= V

,f ≤ 1 kHz,

I(FB)

= 1 mA to 50 mA

LED

= 10 mA,

= 10 mA,

= 10 mA,

= 10 mA,

= 10 mA,

= 0,

TPS5904, TPS5904A

TAOS017 – SEPTEMBER 1999

1.2 1.4 V

2.48 2.5 2.52

2.49 2.5 2.51
25 mV

–1.1 –2 mV/ V

1.5 3 µΑ

0.5 µΑ

0.18 0.5 µΑ

0.1 Ω

V

Output

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

I

CEO

V

(BR)ECO

Collect dark current VCE = 35 V, See Figure 5 100 nA
Emitter-collector voltage breakdown IE = 100 µA 7 V

Coupler

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

CTR Current transfer ratio

V

CE(sat)

†

V

iso

C

io

†

This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology.

Collector-emitter saturation voltage
Isolation voltage IIO = 10 µA, f = 60 Hz 7500 V

Input to output capacitance VIO = 0, f = 1 kHz 0.6 pF

TPS5904
TPS5904A

V

= V

=

I(FB

,I

,

I

LED

VCE = 5 V, See Figure 6
V

O(COMP)

= V

I(FB)

,I

I(LED)

IC = 1 mA, See Figure 6

= 5 mA,

= 5 mA,

= 10 mA,

100% 400%
150% 300%

0.1 0.2 V

www.taosinc.com





3