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BD9731KV 반도체 회로 부품 판매점

5-channel switching regulator controller



ROHM Semiconductor 로고
ROHM Semiconductor
BD9731KV 데이터시트, 핀배열, 회로
01W038A
5-channel switching regulator controller
BD9731KV
Description
BD9731KV is a PWM switching regulator controller IC.
The 5-channel (4 channel for step-up, and 1 channel for
step-down) switching regulator controllers are integrated
into a VQFP48 package. This IC can operate both Bipolar
and MOS transistor. Triangle wave oscillator, reference
voltage, PWM comparator, CMOS type driver, and short
protection circuit are integrated.
Dimension (Units : mm)
9.0±0.3
7.0±0.2
36 25
37 24
48
1
13
12
0. 15±0. 1
Features
1) Can operate both external transistors of Bipolar and MOS.
(Base current can be set by resistance.)
2) Built-in output shutdown circuit (Timer latch) when overloaded.
3) Channel 1, and 5 can externally set the reference voltage.
4) Channel 1, 4, and 5 can control independently ON/OFF.
5) All channels have dead time control.
0.5 0.2±0. 1
0. 10
VQFP48
Applications
Digital still camera, Portable DVD player, W-CDMA, PDA, Digital movie camera
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Limits
Maximum applied voltage
Vmax
–0.3 ~ +12
Power dissipation
400 1
Pd
900 2
Operating temperature range Topr
–20 ~ +85
Storage temperature range
Tstg
–55 ~ +125
Derating : 4.0mW/˚C for operation above Ta=25˚C (Only IC unit)
PCB (70mmx70mm, t=1.6mm) glass epoxy mounting. Derating : 9.0mW/˚C for operation above Ta=25˚C
Unit
V
mW
˚C
˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Symbol Min. Typ.
Power supply voltage
Oscillating frequency
VCC 2.8
fosc 100
Output current
IOUT
Max.
11
700
30
Unit
V
kHz
mA
May, 2001


BD9731KV 데이터시트, 핀배열, 회로
Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=6V, fosc=0.20MHz, STB1~5=3V)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Circuit current at stand-by Ist — — 10 µA STB1~5=0V
Circuit current at operating
Icc
— 4.5 9.5 mA
<Reference voltage>
Output voltage
Vref 1.485 1.5 1.515
V Iref=–1mA
<Internal regulator>
Output voltage REGA
VREGA 2.4 2.5 2.6
V Ireg=–1mA
<Shutdown at overloaded>
CH1~5 threshold voltage Vsc1~5 1.425 1.5 1.575
V VSCP1~5=2V~1V
<Protection circuit>
SCP pin detection circuit
Triangle wave oscillator
Vtsc 0.90 1.0 1.10
V VSCP=0V~1.5V
Oscillating frequency
fosc1 0.179 0.20 0.221 MHz RT=24k, CT=220pF
<Output>
Output voltage 'H' at operating VSATH Vcc–0.3 Vcc–0.1 —
V Io=10mA
Output voltage 'L' at operating VSATL
0.1
0.3
V Io=–10mA
Maximum output source current IOSOURCE — — 30 mA
Maximum output sink current
<STB1~5>
Iosink
— –30
mA
STB pin
Operating VSTBL
2.0
V
control voltage Non-operating VSTBH –0.3
0.3
V
Block Diagram
33 29
VREF 34
REG A
VOLTAGE
REFERENCE
To Control
Block
REG D
31 VREGD
U.V.L.O
TIMER LATCH
SQ
R
To-Divers
DTC1 43
FB1 40
INV1 41
NON1 42
SCP1 39
DTC2 38
FB2 36
INV2 35
SCP2 37
DTC3 26
FB3 24
INV3 23
SCP3 25
DTC4 19
FB4 21
INV4 22
SCP4 20
ERRAMP1
SCPcomp1
ERRAMP2
SCPcomp2
ERRAMP3
SCPcomp3
ERRAMP4
SCPcomp4
PWM
PWM
PWM
PWM
Pch DRIVER
Pch DRIVER
Pch DRIVER
Pch DRIVER
3 PVCC1
2 OUT1
1 RBIAS1
4 OUT2
5 RBIAS2
44 PGND1
8 PVCC2
7 OUT3
6 RBIAS3
9 OUT4
10 RBIAS4
DTC5 14
FB5 16
INV5 17
NON5 18
SCP5 15
ERRAMP5
SCPcomp5
TRIANGLE
FORM
OSC
27 28
PWM
OSC
BUFFER
ON/OFF
LOGIC
48 47 46 45
Nch DRIVER
13 RBIAS5
12 OUT5
11 PGND2
BD9731KV




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BD9731KV controller

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BD9731KV

5-channel switching regulator controller - ROHM Semiconductor