bd9217fv ROHM Co. Ltd., bd9217fv Datasheet - Page 3

• Manufacturer Part Number: bd9217fv
• Description: Dc-ac Inverter Control Ic
• Manufacturer: ROHM Co. Ltd.

〇Package Dimensions
〇Block Diagram
○Pin Description
PIN
No.
10
11
12
1
2
3
4
5
6
7
8
9
PGND
N2
P2
UVLO
CLKIN
RT
SRT
GND
BCT
BRT
DUTY
STB
PIN NAME
SOP24(unit:mm)
BD9217F
frequency of saw tooth wave。
frequency of Burst dimming
External resistor between SRT and RT for adjustment
frequency of kick-off
Power Ground for FET drivers
NMOS FET driver (Channel 2 side)
PMOS FET driver (Channel 2 side)
Input of Under Voltage Lock Out
CT Synchronous signal input
External resistor between RT and GND for adjustment
Ground
External capacitor between BCT and GND for adjusting
the BURST triangle oscillator
External resistor between BRT and GND for adjustment
Control Burst-dimming by PWM signal or DC
Stand-by switch
GND
STB
FB
SS
IS
VS
FUNCTION
REG
BLOCK
STB
BLOCK
VCC
F/B
BLOCK
COMP
REG
SYSTEM ON/OFF
PROTECT
BLOCK
DEVICE MARK
Lot No.
CP
SEL
SS
CT
SRT
CLKIN
OSC
BLOCK
REV. C
PWM
BLOCK
VCC
RT
PIN
No.
13
14
15
16
17
18
19
20
21
22
23
24
UVLO
ブロック
UVLO
BRT BCT
BOSC
BLOCK
LOGIC
BLOCK
CP
FAIL
SEL
VS
IS
FB
SS
REG
COMP
VCC
P1
N1
PIN NAME
FAIL
DUTY
DUTY
BLOCK
OUTPUT
BLOCK
SSOP-B24(unit:mm)
REG
External capacitor between CP and GND for timer latch
Error Indication output pin Normal : H, Error : L
Selector pin for external syncro-mode frequency
Error amplifier input 1
Error amplifier input 2
Error amplifier output
regulator output
Input of over voltage detector
Power supply input with UVLO Protection
PMOS FET driver (Channel 1 side)
NMOS FET driver (Channel 1 side)
External capacitor between SS and GND for Soft Start
BD9217FV
and detect the time of Soft Start
REG(Pin 20) :
Pull-up fin=Fout(DUTY=50%), Gnd-short : fin=Fout x 2
Control
PGND
P1
N1
P2
N2
FUNCTION
3/4