Harman Kardon AVR 171 (serv.man3) Service Manual ▷ View online
DB1230
Preliminary Datasheet DB1230P-02
19. Oct. 2011
2 of 19
PIN DESCRIPTION
PIN NO.
SYMBOL
DESCRIPTION
1 EN
Enable pin.
For automatic start-up, please leave it open and in case of on/off control, there
should be pull-down resistor.(10K~100Kohm)
For automatic start-up, please leave it open and in case of on/off control, there
should be pull-down resistor.(10K~100Kohm)
2 FB
Feedback pin.
External resistors are connected between OUT and GND to set the regulated
output voltage based on 0.8V reference.
External resistors are connected between OUT and GND to set the regulated
output voltage based on 0.8V reference.
3 VCC
Internal regulated output.
A decoupling capacitor should be close to this pin as possible
A decoupling capacitor should be close to this pin as possible
4 SS
External soft-start program pin.
An external capacitor should be connected to GND.
An external capacitor should be connected to GND.
5 GND
Ground.
6 SW
Switching Node.
An inductor, internal high-side and low-side power switches are connected
An inductor, internal high-side and low-side power switches are connected
7 BS
Bootstrap pin.
The bootstrap charge capacitor should be connected between BS and SW to
provide a supply to gate driver of high-side power switch.
The bootstrap charge capacitor should be connected between BS and SW to
provide a supply to gate driver of high-side power switch.
8
IN
Input power supply pin.
EP Exposed
Pad
Exposed pad. Connect the exposed pad to GND for heat sink.
This pin combines thermal sink and power ground.
This pin combines thermal sink and power ground.
PIN CONFIGURATION
TOP VIEW
8-SOP-EP Package
Fig.3 DB1230 PIN configuration
Harman Kardon
AVR 171 Service Manual
Page 101 of 174
DB1230
Preliminary Datasheet DB1230P-02
19. Oct. 2011
3 of 19
PIN DESCRIPTION
PIN NO.
SYMBOL
DESCRIPTION
1
NC
No Connection pin.
2 FB
Feedback pin.
External resistors are connected between OUT and GND to set the regulated
output voltage based on 0.8V reference.
External resistors are connected between OUT and GND to set the regulated
output voltage based on 0.8V reference.
3 VCC
Internal regulated output.
A decoupling capacitor should be close to this pin as possible
A decoupling capacitor should be close to this pin as possible
4 SS
External soft-start program pin.
An external capacitor should be connected to GND.
An external capacitor should be connected to GND.
5
AGND
Analog Signal Ground.
6
NC
No Connection pin.
7 EN
Enable pin.
For automatic start-up, please leave it open and in case of on/off control, there
should be pull-down resistor.(10K~100Kohm)
For automatic start-up, please leave it open and in case of on/off control, there
should be pull-down resistor.(10K~100Kohm)
8 PGND
Power
Ground.
9 PGND
Power
Ground.
10 SW
Switching Node.
An inductor, internal high-side and low-side power switches are connected
An inductor, internal high-side and low-side power switches are connected
11 SW
Switching Node.
An inductor, internal high-side and low-side power switches are connected
An inductor, internal high-side and low-side power switches are connected
12 BS
Bootstrap pin.
The bootstrap charge capacitor should be connected between BS and SW to
provide a supply to gate driver of high-side power switch.
The bootstrap charge capacitor should be connected between BS and SW to
provide a supply to gate driver of high-side power switch.
13
IN
Input power supply pin.
14
NC
No Connection pin.
PIN CONFIGURATION
TOP VIEW
14-TSSOP-EP Package
Fig.4 DB1230 PIN configuration
Harman Kardon
AVR 171 Service Manual
Page 102 of 174
Harman Kardon
AVR 171 Service Manual
Page 103 of 174
Harman Kardon
AVR 171 Service Manual
Page 104 of 174
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