Page 1
Ordering number : EN6205
LB1695D
Monolithic Digital IC
LB1695D
Three-Phase Brushless Motor Driver for DC Fan
Overview
The LB1695D is a driver IC for 3-phase brushless DC fan
motors such as used in water heaters and other domestic
electrical appliances.
Package Dimensions
unit: mm
3037A-DIP20H
[LB1695D]
20
11
Features
• Three-phase brushless motor driver
• Withstand voltage 45V, output current 2A
• Built-in current limiter
• Built-in low-voltage protection circuit
• Built-in thermal shutdown circuit
• Built-in Hall amplifier with hysteresis
• FG output function
8.4
R1.7
1
2.07 2.54 1.3
0.6
20.0
27.0
12.7
10
4.04.0
11.2
SANYO : DIP20H
Specifications
Absolute Maximum Ratings at Ta = 25˚C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage
Maximum output current IO max 2.0 A
Allowable power dissipation
Operating temperature Topr –20 to +100 °C
Storage temperature Tstg –55 to +150 °C
VCC max 10 V
VM max 45 V
Pd max1 IC only 3 W
Pd max2 With an arbitrary large heat sink 20 W
0.4
Allowable Operating Ranges at Ta = 25˚C
Parameter Symbol Conditions Ratings Unit
V
Power supply voltage range
Power supply startup voltage slew ∆VCC/∆tVCC = V
rate ∆VM/∆tVM = 0V point *1 Up to 0.16 V / µs
*1 After power-on, if the power supply voltage rise is fast, there may be some feedthrough current in the output.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
CC
V
M
(OFF) point *1 Up to 0.04 V / µs
LVSD
4.5 to 9.0 V
5 to 42 V
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63099RM(KI)
No. 6205-1/10
Page 2
LB1695D
Electrical Characteristics at Ta = 25°C, VCC = 5V, VM = 30V
Parameter Symbol Conditions
Power supply current I
Output saturation voltage
VOsat1 IO = 0.5A VO (sink) + VO (source) 1.8 2.4 V
VOsat2 IO = 1.0A VO (sink) + VO (source) 2.1 2.8 V
Forward 13 19 mA
CC
Output leakage current IO leak 100 µA
[Hall amplifier]
Input bias current I HB 1 4 µA
Common mode input voltage range V
Hysteresis width ∆V
Input voltage L -> H V
Input voltage H -> L V
ICM
IN
SLH
SHL
[FG pin (Speed pulse output)]
Output Low level voltage V
Pull-up resistor value R
FGLIFG
FG
= 5 mA 0.4 V
[Forward/reverse operation]
Forward V
Reverse V
FR1
FR2
[Current limiter operation]
Limiter V
RF
[Thermal shutdown operation]
Operating temperature TSD Design target value 150 180 °C
Hysteresis width ∆TSD Design target value 40 °C
[Low-voltage protection circuit operation]
Operating voltage V
Release voltage
Hysteresis width ∆V
V
LVSD
LVSD
(OFF)
LVSD
[C pin]
Charge current I
Discharge current I
Charge start voltage V
Discharge start voltage V
R = 33 kΩ 30 40 50 µA
CL
R = 33 kΩ 90 120 150 µA
CH
R = 33 kΩ 0.3 0.4 0.5 V
CL
R = 33 kΩ 1.5 2.0 2.5 V
CH
Output current ignore time t sm R = 33 kΩ, C = 4700 pF 58 68 78 µs
Output off time t so R = 33 kΩ, C = 4700 pF 164 193 222 µs
Ratings
min typ max
1.5
VCC–1.8
21 30 37 mV
51525mV
–25 –15 –5 mV
7.5 10 12.5 kΩ
0 0.8 V
4.2 V
CC
0.42 0.5 0.6 V
3.5 3.8 4.1 V
4.3 4.5 V
0.4 0.5 0.6 V
Unit
V
V
No. 6205-2/10
Page 3
Truth Table
Input
IN1 IN2 IN3 F/R Source -> Sink FG1 FG2
1HLH
2HLL
3HHL
4LHL
5LHH
6LLH
F/R FG output
Forward L 0.0 to 0.8V FG1
Reverse H 4.2 to 5.0V FG2
LB1695D
Forward/reverse control
L OUT2 -> OUT1
H OUT1 -> OUT2
L OUT3 -> OUT1
H OUT1 -> OUT3
L OUT3 -> OUT2
H OUT2 -> OUT3
L OUT1 -> OUT2
H OUT2 -> OUT1
L OUT1 -> OUT3
H OUT3 -> OUT1
L OUT2 -> OUT3
H OUT3 -> OUT2
Output FG output
LL
LH
LL
HH
HL
HH
Block Diagram and Peripheral Circuitry
+
V
CC
Reg
Hys.Amp
+
IN1
–
+
IN2
–
+
IN3
–
1.3V
2.3V
TSD
Logic
FG2FG1F/R
Current
Limiter
LVSD
VM
OUT1
OUT2
OUT3
RF
+
VM
Rf
GND
0.5V
CR
No. 6205-3/10
Page 4
LB1695D
Pin Description
Pin name Pin number Function
VCC 1 Power supply pin for blocks except output
R 2 C pin charge/discharge current set pin
C 3 Setting pin for current limiter output off time and output current ignore time
NC 4, 9 May be used for wiring
OUT1 5 Output pin 1
OUT2 6 Output pin 2
OUT3 7 Output pin 3
RF 8
VM 10 Power supply pin for output
GND 11
F/R 12 Forward/reverse control pin
IN1+, IN1– 17, 18 Hall input pin Logic High refers to IN+ > IN–
IN2+, IN2– 15, 16 Hall input pin Logic High refers to IN+ > IN–
IN3+, IN3– 13, 14 Hall input pin Logic High refers to IN+ > IN–
FG1 20 Speed pulse output pin 1 with built-in pull-up resistor
FG2 19 Speed pulse output pin 2 with built-in pull-up resistor
Output current detection pin. Insert a resistor (Rf) between this pin and ground.
The output current will be limited to the value determined by VRF/Rf (output current limiter).
Ground for blocks except output
Lowest electrical potential of output transistors is voltage at RF pin.
Pin Assignment
24
20
16
VCC
FG2FG1
IN2– IN2+ IN3– IN3+ F/R GND
IN1+IN1–
11121317181920 141516
LB1695D
Top view
10654329871
R
C
Pdmax – Ta
OUT3OUT1OUT2
With an arbitrary large heat sink
VMRF NCNC
12
8
4
3
Allowable power dissipation, Pdmax – W
0
–20 0 20 40 60 80 100 120
Ambient temperature, Ta – °C
Without heat sink
8.0W
1.2W
No. 6205-4/10
Page 5
Pin Equivalent Circuit
Pin number
3
2
Pin name
C
R
Pin voltage
LB1695D
Equivalent circuit
Vcc
10
2.0V
2
Vcc
2.0V
0.4V
5
6
7
8
OUT1
OUT2
OUT3
RF
VM
Vcc
0.5V
200Ω
×4
200Ω
200Ω
3
10
6
5
7
12
F/R
0.0V min
VCC max
Vcc
10 kΩ
10 kΩ
10 kΩ
20 kΩ
8
12
Continued on next page
No. 6205-5/10
Page 6
Continued from preceding page
Pin number
17
18
15
16
13
14
Pin name
IN1+
IN1–
IN2+
IN2–
IN3+
IN3–
1.5V min
VCC–1.8V max
LB1695D
Vcc
13
15
17
200Ω
Equivalent circuitPin voltage
200Ω
14
16
18
20
19
FG1
FG2
Vcc
10kΩ
19
20
No. 6205-6/10
Page 7
LB1695D
Description of the LB1695D
1. Hall input circuit
The Hall input circuit is a differential amplifier with a hysteresis of 30 mV (typ.). The operating DC level must be
within the common mode input voltage range (1.5V to VCC – 1.8V). To prevent noise and other adverse influences,
the input level should be at least 3 times the hysteresis (120 to 160 mVp-p). If noise evaluation at the Hall input
shows a problem, a noise-canceling capacitor (about 0.01 µF) should be connected across the Hall input IN+ and
IN– pins.
2. Protection circuits
2-1. Low voltage protection circuit
When the VCC voltage falls below a certain level (V
sink-side output transistors to prevent malfunction caused by a VCC voltage drop.
2-2. Thermal shutdown circuit
When the junction temperature rises above a certain value (TSD), the thermal shutdown circuit cuts off the
sink-side output transistors to prevent IC damage due to overheating. Design the application heat
characteristics so that the protection circuit will not be triggered under normal circumstances.
), the low voltage protection circuit cuts off the
LVSD
3. FG output circuit
The Hall input signal at IN1, IN2, and IN3 is synthesized and subject to waveform shaping before appearing at this
output. The signal at FG1 has the same frequency as the Hall input, and the signal at FG2 has a frequency that is
three times higher than the Hall input.
4. Forward/Reverse control circuit
This IC is designed under the assumption that forward/reverse (F/R) switching will not be carried out while the
motor is running. If switching is carried out while the motor is running, a feedthrough current flows in the output
and a problem will be caused regarding ASO. F/R switching should be carried out while the VM power supply is
off (motor is stopped).
5. VCC, VM power supply
When the power supply voltage (VCC, VM) rises very quickly at power-on, a feedthrough current may flow in the
output and a problem will be caused regarding ASO. The power supply rise speed should be kept below ∆VCC/∆t =
0.04V/µS and ∆VM/∆t = 0.16V/µS. For the power-up sequence, VCC should be turned on before VM.
The sequence at power-down should be VM first, and then motor stop, and then VCC. With some motors, if VCC is
switched off immediately after VM, while the motor is still rotating due to inertia, the VM voltage may rise and
exceed the withstand voltage.
6. Power supply stabilizing capacitors
If the VCC line fluctuates drastically, the low-voltage protection circuit may be activated by mistake, or other
malfunctions may occur. The VCC line should therefore be stabilized by connecting a capacitor of at least several
µF between VCC and ground. Because a large switching current flows in the VM line, wiring inductance and other
factors can lead to VM voltage fluctuations. As the GND line also fluctuates, the VM line must be stabilized by
connecting a capacitor of at least several µF between VM and ground, to prevent malfunction or exceeding the
withstand voltage. Especially when long wiring runs (VM, VCC, GND) are used, sufficient capacitance should be
provided to ensure power supply stability.
Continued on next page
No. 6205-7/10
Page 8
LB1695D
Continued from preceding page
7. Current limiter circuit
The current limiter circuit cuts off the sink-side output transistors when the output current reaches a preset value
(limiter value). This limits the output current peak value.
For detection of output current, the RF pin is used. By connecting the resistance Rf between the RF pin and
ground, the output current can be detected as a voltage. When the RF pin voltage reaches 0.5V (typ.), the current
limiter is activated. This limits the output current to the value determined by 0.5/Rf.
7-1. Output off time
When the current limiter circuit was triggered and has switched off the sink-side output transistors, it will
turn them on again after a preset interval (power off time). By switching the output in this way, the current
limiter circuit of the LB1695D reduces the likelihood of ASO problems as compared to current limiters using
the non-saturation output principle.
The output off time is determined by the charge time for the capacitance C connected to the C pin. When the
limiter is triggered, C starts to charge, and the time required for the C voltage to reach 2V (typ.) is the output
off time. When C was charged to 2V, the sink-side output is turned on again. The charge current for C is
constant-current and is determined by the resistance R connected to the R pin. The C charge current ICL and
the output off time toff are calculated according to the following equations.
.
I
= 1.3/R (R should be between 13 kΩ to 100 kΩ)
.
CL
.
toff = C/ICL × 2.0
.
.
= 1.53 × R × C
.
7-2. Output current ignore time
While the sink-side output is turned off by the current limiter, a regenerative current flows in the upper side
regenerative current absorption diode connected externally. When the output off time has elapsed and the
sink-side output is turned on again, a momentary reverse current flows in the external diode (due to the
reverse recovery time of the diode), which causes a limiter-value current to flow momentarily in the output.
If this triggers the current limiter again, the output will be turned off, which lowers the average current and
causes a reduction in motor torque for example during startup. To prevent this, the circuit is designed not to
monitor the output current for a certain period after the sink-side output were turned off and on again. This is
called the output current ignore time.
The output current ignore time is determined by the discharge time of the capacitance C connected to the C
pin. After the current limiter was triggered and C was charged to 2V, the discharge process starts. The time
required to discharge to a voltage of 0.4V (typ.) is the output ignore time. The discharge current for C is
constant-current and is about 3 times the charge current (ICL). Therefore the output current ignore time is
about 1/3 of the output off time.
The C discharge current ICH and the output current ignore time tsm are calculated according to the following
equations.
.
I
= 1.3/R × 3
.
CH
.
tsm = C/ICH × 1.6
.
.
= 0.41 × R × C
.
Continued on next page
No. 6205-8/10
Page 9
Continued from preceding page
Because the current limiter circuit is slanted towards the ON time for turning the sink-side output on again,
the reverse current will not be so large even if a rectifying diode (without a short reverse recovery time) is
used as regenerative current absorption diode connected externally.
7-3. Output off time setting
The output off time must be optimized for the type of motor that is being controlled. The output off time
setting is controlled by the external resistance connected to the R pin and the external capacitance connected
to the C pin. Figure 1 shows the current limiter operating waveform.
(1) Short output off time setting
Because the IC is designed internally to give a ratio of about 3:1 for the output off time and output
current ignore time, the two values cannot be set independently. If the output off time is set to a very
small value, the output current ignore time may be too short. In such a case, the external regenerative
current absorption diode acts to limit current flow by its reverse current (see section 7-2). If the output
off time is small, the diode reverse current will increase, which can lead to ASO problems.
LB1695D
(2) Long output off time setting
If the output off time is set to a very high value, the average current will be reduced, resulting in lower
motor startup torque. Depending on the motor type, the circuit may not change from the current limiter
operating state to the normal rotation state.
tsmtso
2.0V
0.4V
0.0V
0.5V
0.0V
toff
C pin voltage
RF pin voltage
Figure. 1 Current limiter operating waveform
Continued on next page
No. 6205-9/10
Page 10
LB1695D
Continued from preceding page
8. Internal power dissipation calculation
Pd = (VCC × ICC) + (VM × IM) – (motor coil power dissipation)
9. IC temperature rise measurement
Because the chip temperature of the IC cannot be measured directly, measurement should be carried out according
to one of the following procedures.
9-1. Thermocouple measurement method
A thermocouple element is mounted to the IC heat dissipation fin. This measurement method is easy to
implement, but it will be subject to measurement errors if the temperature is not stable.
9-2. Measurement using internal diode characteristics of IC
This is the recommended measurement method. It makes use of the parasitic diode incorporated in the IC
between FG1 and GND. Set FG1 to High (off) and measure the voltage VF of the parasitic diode to calculate
the temperature.
(Sanyo data: for IF = –1 mA, VF temperature characteristics are about –2 mV/°C)
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of June, 1999. Specifications and information herein are subject to change
without notice.
No. 6205-10/10
PS
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