BD9011KV-E2 データシートの表示（PDF） - ROHM Semiconductor
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BD9011KV-E2
ROHM Semiconductor
BD9011KV-E2 Datasheet PDF : 29 Pages
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● Pin Description
1 FB1
(BD9775FV)
2 INV1
3 RT
4 CT
5 Fin
6 GND
7 VREF
8 DTC1
9 DTC2
10 INV2
11 FB2
12 CTL1
13 CTL2
14 VCC
VS1 28
CL1 27
PVCC1 26
OUT1 25
VREGB 24
OUT2H 23
PVCC2 22
CL2 21
VS2 20
SCP 19
VREGA 18
OUT2L 17
PGND 16
SYNC 15
●Block Diagram (BD9775FV)
Fig.1
●PinNo/PinName (BD9775FV)
Pin
Pin
No. Name
Description
1
FB1 Error amplifier output pin（Channel 1）
2
INV1 Error amplifier negative input pin（Channel 1）
3
RT
Oscillator frequency adjustment pin
connected resistor
4
CT
Oscillator frequency adjustment pin
connected capacitor
5
FIN Oscillator synchronization pulse signal input pin
6
GND Low-noise ground
7
VREF Reference voltage output pin
8
DTC1
Maximum duty and soft start adjustment
pin（Channel 1）
9
DTC2
Maximum duty and soft start adjustment
pin（Channel 2）
10
INV2 Error amplifier negative input pin（Channel 2）
11
FB2 Error amplifier output pin（Channel 2）
12 CTL1 Enable/stand-by control input（Channel 1）
13 CTL2 Enable/stand-by control input（Channel 2）
14
VCC Main power supply pin
15 SYNC Synchronous rectification timing adjustable pin
16
PGND
Power ground (connected low-side gate driver
and digital ground)
17
OUT2L
Low-side ( synchronous rectifier ) gate driver
output pin（Channel 2）
18 VREGA Connected capacitor for internal regulator
19
SCP
Delay time of short circuit protection adjustment
pin connected capacitor
20
VS2
Over current detection voltage monitor pin
（connected FET drain, Channel 2）
21
CL2
Over current detection voltage adjustment pin
connected capacitor and resistor（Channel 2）
22
PVCC2
High-side gate driver power supply
input（Channel 2）
23 OUT2H High-side gate driver output pin（Channel 2）
24 VREGB Connected capacitor for internal regulator
25 OUT1 High-side gate driver output pin（Channel 1）
26
PVCC1
High-side gate driver power supply
input（Channel 1）
27
CL1
Over current detection voltage adjustment pin
connected capacitor and resistor（Channel 1）
28
VS1
Over current detection voltage monitor pin
（connected FET drain, Channel 1）
●FUNCTION EXPLANATION (BD9775FV)
1.DC/DC Converter
・Reference Voltage
Stable voltage of compensated temperature, is generated from the power supply voltage (VCC). The reference voltage is 3.0V,
the accuracy is ±1％. Place a capacitor with low ESR (several decades mΩ) between VREF and GND.
・Internal Regulator A （VREGA）
5V is generated the power supply voltage. The voltage is for the driver of the synchronous rectification’s MOSFET. Place a
capacitor with low ESR (several decades mΩ) between VREGA and PGND.
20/28
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