Rainbow Electronics BD9730KV User Manual
5-channel Switching Regulator Controller
BD9730KV
Description
Dimension (Unit : mm)
The BD9730KV is a 5-channel switching regulator
controller IC designed for digital still cameras.
This IC can be operated at 2.5V. (Min.).
The 5-channel (4 channel for step-down and 1 channel
for step-up)switching regulator controllers are
integrated into a VQFP48 package. This IC can
operate both external Bipolar and FET transistors.
A triangle wave oscillator, a reference voltage, PWM
comparator, a CMOS type driver, and a short protection
circuit are all integrated in this single IC.
Features
1) Operates at a supply voltage of 2.5V (Min.)
2) High-precision reference voltage of 1.0V±1.2%
3) Can operate both external transistors of FET and Bipolar
(Base current can be set by resistance.)
4) All channels have dead time control
5) Built-in output shutdown circuit (timer latch) when overloaded
6) Channels 1 and 5 can externally set the reference voltage
7) Channels 1, 4 and 5 can control independently the ON/OFF
Applications
Digital still camera, portable DVD player, digital movie camera, PDA, W-CDMA
37
0.2
±
7.0
9.0±0.3
48
0. 1
±
0.5
1.425
0. 10
VQFP48
9.0±0.3
7.0±0.2
1
2536
12
0.2±0. 1
24
13
0.4
0. 15±0.1
0. 10
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Maximum applied voltage
Power dissipation
Operating temperature range
Storage temperature range
∗1 When only IC is used. Derating : 4.0mW/˚C for operation above Ta=25˚C
∗2 PCB (70mmx70mm, t=1.6mm) glass epoxy mounting.
Derating : 9.0mW/˚C for operation above Ta=25˚C
Symbol
Vmax
Pd
Topr
Tstg
-
0.3
-
20
-
55
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. UnitTyp.Symbol
Supply voltage
Oscillating frequency
Output current
∗3 REG output voltage is derated when Vcc is less than 2.6V~2.5V.
∗3
VCC
fosc
100 700 kHz
IOUT
Limits
+
12
~
400
900
+
85
~
+
125
~
—2.5 11
—
—— 30
Unit
V
∗1
∗2
mW
˚C
˚C
V
mA
Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=6V, fosc=0.20MHz, STB1~5=3V)
Symbol Min. Max. Unit ConditionsTyp.Parameter
Circuit current at standby
Circuit current at operating
(Reference voltage)
Output voltage
(Internal regulator)
Output voltage REGA
(Shutdown at overload)
CH1~5 threshold voltage
(Protection circuit)
SCP pin detection voltage
Triangular oscillator)
Oscillating frequency
(Output)
Output voltage "H" at operating
Output voltage "L" at operating
Maximum output source current
Maximum output sink current
(STB1~5)
STB pin
control voltage
Operating
Non-operating
Ist
Icc
Vref
VREGA
Vsc1~5
Vtsc
fosc1 0.179
VSATH
VSATL
IOSOURCE
Iosink
VSTBL
VSTBH
-
-
0.988
2.4
0.90
0.90
Vcc-0.4
-
30
-
2.0
-
0.3
-
4.8
1.0
2.5
1.0
1.0
0.200
Vcc-0.2
0.2
-
-
-
-
10
9.5
1.012
2.6
1.10
1.10
0.221
-
0.4
-
-
30
-
0.3
µA
mA
V
V
V
V
MHz
V
V
mA
mA
V
V
STB1~5=0V
Iref=-1mA
Ireg=-1mA
VSCP1~5=1.5V~0.5V
VSCP=0V~1.5V
RT=24kΩ, CT=220pF
Io=10mA
Io=-10mA
Application Circuit
VREGA
VREGA
VREGA
VREGA
VREGA
REG A
To Control
OSC
BUFFER
VREGA
4.7µF
33
29
VR
SC
EGA
P
U.V.L.O
S
PWM
COMP.1
PWM
COMP.2
PWM
COMP.3
PWM
COMP.4
PWM
COMP.5
B
T
TIMER LATCH
S
Q
ON/OFF
LOGIC
4
5
474
4
8
6
T
S
S
S
B
2
T
B
3
4
1
Block
R
Pch DRIVER
Pch DRIVER
Pch DRIVER
Pch DRIVER
Nch DRIVER
B
T
5
To-Divers
PGND1
BD9730KV
PVCC1
3
OUT1
2
1
RBIAS1
OUT2
4
RBIAS2
5
4
4
8
PVCC2
7
OUT3
6
RBIAS3
9
OUT4
1
0
RBIAS4
RBIAS5
1
3
1
2
OUT5
1
1
PGND2
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
SCP1
INV1
SCP2
INV2
SCP3
INV3
SCP4
INV4
SCP5
INV5
VCC
30
32
GN
V
CC
D
VREF
VREF
INV1
VREF
SCP1
INV2
SCP2
INV3
SCP3
INV4
SCP4
INV5
VREF
SCP5
3
4
10µF
DTC1
4
3
FB1
4
0
INV1
4
1
NON1
4
2
SCP1
3
9
DTC2
3
8
FB2
3
6
INV2
3
5
SCP2
3
7
DTC3
2
6
2
4
FB3
2
3
INV3
SCP3
2
5
DTC4
1
9
FB4
2
1
INV4
2
2
SCP4
2
0
DTC5
1
4
FB5
1
6
INV5
1
7
NON5
1
8
SCP5
1
5
REFERENCE
ERRAMP1
ERRAMP2
SCPcomp2
ERRAMP3
SCPcomp3
ERRAMP4
ERRAMP5
TRIANGLE
R
T
VOLTAGE
SCPcomp1
SCPcomp4
SCPcomp5
FORM
OSC
7
282
C
T
Loading...