View BD9731KV_1136900.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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)
9.00.3 7.00.2 36 9.00.3 7.00.2 37 48 1 1.4250. 1 0. 10 25 24 13 12 0.4 0. 150. 1 0. 10
0.5
0.20. 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. Applications
VQFP48
Digital still camera, Portable DVD player, W-CDMA, PDA, Digital movie camera Absolute Maximum Ratings (Ta=25C)
Parameter Maximum applied voltage Power dissipation Operating temperature range Storage temperature range Symbol Vmax Pd Topr Tstg -20 -55 Limits -0.3 ~ 400 900 +12
1 2
Unit V mW
~ ~
+85 +125
C C
Derating : 4.0mW/C for operation above Ta=25C (Only IC unit) PCB (70mmx70mm, t=1.6mm) glass epoxy mounting. Derating : 9.0mW/C for operation above Ta=25C
Recommended Operating Conditions (Ta=25C)
Parameter Power supply voltage Oscillating frequency Output current Symbol VCC fosc IOUT Min. 2.8 100
--
Typ.
-- -- --
Max. 11 700 30
Unit V kHz mA
May, 2001
Electrical characteristics (Unless otherwise noted; Ta=25C, Vcc=6V, fosc=0.20MHz, STB1~5=3V)
Parameter
Circuit current at stand-by
Symbol Ist Icc Vref VREGA Vsc1~5 Vtsc fosc1 VSATH VSATL Iosink VSTBL VSTBH
Min. -- -- 1.485 2.4 1.425 0.90 0.179
Typ. -- 4.5 1.5 2.5 1.5 1.0 0.20
Max. 10 9.5 1.515 2.6 1.575 1.10 0.221 -- 0.3 30 -30 -- 0.3
VREGA
33
Unit A mA V V V V MHz V V mA mA V V
Conditions STB1~5=0V
Circuit current at operating Output voltage Output voltage REGA CH1~5 threshold voltage SCP pin detection circuit Triangle wave oscillator Oscillating frequency
Output voltage 'H' at operating Output voltage 'L' at operating Maximum output sink current
Iref=-1mA Ireg=-1mA VSCP1~5=2V~1V VSCP=0V~1.5V RT=24k, CT=220pF Io=10mA Io=-10mA
Vcc-0.3 Vcc-0.1 -- -- -- 2.0 -0.3
30.GND 32.VCC
0.1 -- -- -- --
Maximum output source current IOSOURCE
STB pin control voltage
Operating Non-operating
SCP
29
Block Diagram
REG D REG A U.V.L.O VREF 34 VOLTAGE REFERENCE To Control Block TIMER LATCH S R Q To-Divers
31 VREGD
DTC1 43 FB1 40 INV1 41 NON1 42 SCP1 39 DTC2 38 FB2 36 INV2 35
3 PVCC1
ERRAMP1 PWM SCPcomp1
Pch DRIVER
2 OUT1 1 RBIAS1
ERRAMP2 PWM SCPcomp2
Pch DRIVER
4 OUT2 5 RBIAS2 44 PGND1 8 PVCC2
SCP2 37 DTC3 26 FB3 24 INV3 23
ERRAMP3 PWM SCPcomp3
Pch DRIVER
7 OUT3 6 RBIAS3
SCP3 25 DTC4 19 FB4 21 INV4 22
ERRAMP4 PWM
Pch DRIVER
9 OUT4 10 RBIAS4
SCP4 20
SCPcomp4
DTC5 FB5 INV5 NON5
14 16 17 18 13 RBIAS5
ERRAMP5 PWM SCPcomp5 TRIANGLE FORM OSC OSC BUFFER ON/OFF LOGIC
Nch DRIVER
12 OUT5
SCP5 15
11 PGND2
27
28
48 47 46 45
BD9731KV
STB1
STB23
STB4
STB5
RT
CT

▲Up To Search▲

Price & Availability of BD9731KV

	To Download BD9731KV Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .