BA9736KV

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 comparator, 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 transistors, and the on current can be set to the rating current 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. FAbsolute maximum ratings (Ta = 25_C) 5) For channel control, by making STB low level, all channels go off, and by making STB3 low level, channel 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). FRecommended operating conditions (Ta = 25_C) 432 Regulator ICs FBlock diagram BA9736KV 433 Regulator ICs FPin descriptions BA9736KV 434 Regulator ICs BA9736KV FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 7.2V, fOS...