APW7088 데이터 시트보기 (PDF) - Anpec Electronics
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APW7088 Datasheet PDF : 25 Pages
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APW7088
Pin Description (Cont.)
PIN
NAME
FUNCTION
21
VID2
One of DAC Inputs, same as VID0 and VID1.
Supply Voltage Input. This pin provides bias supply for the low-side gate drivers and the bootstrap
22
VCC
circuit for high-side drivers. This pin can receive a well-decoupled 8V~13.2V supply voltage.
Ensure that this pin is bypassed by a ceramic capacitor next to the pin.
Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.
23
LGATE1
This pin is monitored by the adaptive shoot-through protection circuitry to determine when the
low-side MOSFET has turned off.
Switch Node for Channel 1. Connect this pin to the source of high-side MOSFET and the drain of
the low-side MOSFET. This pin is used as sink for UGATT1 driver. This pin is also monitored by
24
PHASE1
the adaptive shoot-through protection circuitry to determine when the high-side MOSFET has
turned off. An Schottky diode between this pin and ground is recommended to reduce negative
transient voltage which is common in a power supply system.
25
PGND
Power Ground for the low-side gate drivers. Connect this pin to the source of low-side MOSFETs.
This pin is used as sink for LGATE1 and LGATE2 drivers.
Block Diagram
POK
VCC
FB
DROOP
VID0
VID1
VID2
1.5V
Reference
125%
OV
UV
50%
Droop Control
87.5%
3-Bit
DAC
VDROOP
-
VDAC +
VR
Error
Amplifier
300kHz
Oscillator
and
Sawtooth
VCC
VOSC1
VOSC2
5VCC
Linear
VCC
Regulator
Power-on-
Reset
V5VCC
Over-Temperature
Protection
Control
Logic
Operation
Phase
Selection
3.6V
Soft-Start
ISS
10µA
VCC
5VCC
PGND
MODE
SS
COMP
AGND
BOOT2
UGATE2
PHASE2
LGATE2
CSN2
CSP2
PWM Signal Controller
VCC
Current ICS2
Sense
Current
Balance
120µA
ICS1+ICS2
ICS1
OC
ICS1+ICS2
VCC
Current
Sense
BOOT1
UGATE1
PHASE1
LGATE1
CSN1
CSP1
Copyright © ANPEC Electronics Corp.
11
Rev. A.4 - Feb., 2009
www.anpec.com.tw
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