BD9240FV Datasheet, PDF (3/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

（（FAIL BLOCK : FAIL pin））
FAIL High voltage
FAIL Low voltage
VFAIL_H
VFAIL_L
2.95
-0.3
（（TIMER LATCH BLOCK : CP pin））
CP timer latch detect voltage
VCP
1.91
CP timer latch charge current
ICP
0.85
（（COMP BLOCK））
COMP over voltage detect voltage
VCOMP
3.88
Hysteresis width （COMP）
⊿Vcomp
0.138
（（ PHASE SHIFT BLOCK））
PH voltage H 1
VphH1
VCCx0.85
PH voltage H 2
VphH2
2
PH voltage L
VphL
(This product is not designed to be radiation-resistant.)
〇Package Dimensions
－0.3
3.1
-
2.00
1.05
4.00
0.185
-
-
-
DEVICE NAME
3.25
0.5
2.09
1.25
4.12
0.232
VCC
VCCx0.5
0.8
BD9240FV
BD9240F
V
V
V
uA
V
VSS > 2.4V
V
V
PHASESHIFT MODE1
V
PHASESHIFT MODE2
V
PHASESHIFT MODE3
3/4
Lot No.
Lot No.
〇Block Diagram
SSOP-B28 (unit:mm)
SOP28 (unit:mm)
CLKIN RT PH BRT BCT DUTY1 DUTY2
VCC
STB
SS
FB1
IS1
VS1
FB2
IS2
VS2
GND
STB
BLOCK
SYSTEM ON/OFF
F/B1
BLOCK
OSC
BLOCK
PWM1
BLOCK
PWM2
BLOCK
BOSC
BLOCK
LOGIC
BLOCK
VCC
NA1
OUTPUT1
BLOCK
NB1
PGND
ADIM
BLOCK
VREF
F/B2
BLOCK
VS1, VS2
IS1, IS2
COMP
NA2
OUTPUT2
BLOCK
NB2
VCC
PROTECT
BLOCK
VCC
UVLO
BLOCK
CP SRT FAIL
UVLO
○Pin Description
PIN No.
1
2
3
4
5
PIN NAME
PGND
NA2
NB2
UVLO
CLKIN
6
SRT
7
RT
8
GND
9
BCT
10
BRT
11
VREF
12
DUTY1
13
DUTY2
14
STB
FUNCTION
Power Ground for FET drivers
NMOS FET driver (Channel 2 side)
NMOS FET driver (Channel 2 side)
Input of Under Voltage Lock Out
CT Synchronous signal input
External resistor between SRT and RT for adjustment
frequency of kick-off
External resistor between RT and GND for adjustment
frequency of saw tooth wave
Ground
External capacitor between BCT and GND for adjusting
the BURST triangle oscillator
External resistor between BRT and GND for adjustment
frequency of Burst dimming
Reference voltage input pin for Error amplifier
Control Burst-dimming by PWM signal or DC (Channel 1)
Control Burst-dimming by PWM signal or DC (Channel 2)
Stand-by switch
PIN No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
PIN NAME
CP
FAIL
PH
VS2
IS2
FB2
VS1
IS1
FB1
SS
COMP
VCC
NB1
NA1
FUNCTION
External capacitor between CP and GND for timer latch
Error Indication output pin Normal : H, Error : L
Selector pin for phase shift
Error amplifier input 1 (Channel 2)
Error amplifier input 2 (Channel 2)
Error amplifier output (Channel 2)
Error amplifier input 1 (Channel 1)
Error amplifier input 2 (Channel 1)
Error amplifier output (Channel 1)
External capacitor between SS and GND for Soft Start
Control and detect the time of Soft Start
Input of over voltage detector
Power supply input with UVLO Protection
NMOS FET driver (Channel 1 side)
NMOS FET driver (Channel 1 side)
REV. A