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Regulator ICs

6-channel switching regulator

controller

BA9736KV

The BA9736KV is a 6-channel controller that includes all of the circuits required to construct a switching regulator. The

circuits on the chip include a triangular-wave generator, a reference voltage circuit, an error amplifier, a PWM compara-

tor, a pseudo-totem-pole driver, and a variety of protection circuits.

FApplications

VCR / cameras, digital still cameras, and other portable

equipment

FFeatures

1) The totem-pole driver can directly drive power tran-

sistors, and the on current can be set to the rating cur-

rent using an external resistor.

2) Miss-operation prevention circuit for low-voltage input.

3) Output cutoff circuit (timer latch type) for overload

protection.

4) Channels 1 and 4 employ FETs, and have totem-pole

drivers that rectify synchronously with a chopper. The

duty offset of the chopper can be adjusted externally.

5) For channel control, by making STB low level, all

channels go off, and by making STB3 low level, chan-

nel 3 can be switched off independently.

6) Soft start is applied to all channels using an external

capacitor, and is synchronized with the rising edges

of STB and STB3.

7) VQFP64 package (0.5mm pitch).

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions (Ta = 25_C)