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Regulator ICs
Two-channel switching regulator controller
BA9741F / BA9741FS
The BA9741F and BA9741FS are two-channel switching regulator controllers that use the PWM method. Both circuits can be used for DC to DC conversion for step-up, step-down, and inverting. The IC comes in a compact package, making it ideal for use in portable equipment. FApplications DC / DC converters for video cameras and notebook computers etc. FFeatures 1) High-accuracy reference voltage circuit (±1%). 2) Timer-latch, short-circuit protection circuit 3) Miss-operation prevention circuit for low-voltage input. FAbsolute maximum ratings (Ta = 25_C)
4) Reference voltage with output (2.5V). 5) Rest period adjustment is possible over the entire duty range.
FRecommended operating conditions (Ta = 25_C)
427
Regulator ICs
FBlock diagram
BA9741F / BA9741FS
FPin descriptions
428
Regulator ICs
FElectrical characteristics (unless otherwise noted, Ta = 25_C, and VCC = 6V)
BA9741F / BA9741FS
429
Regulator ICs
BA9741F / BA9741FS
FTiming chart
FElectrical characteristic curves
430
Regulator ICs
BA9741F / BA9741FS
FExternal dimensions (Units: mm)
431
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