BA3960

Regulator ICs Dual circuit, variable output voltage regulator BA3960 The BA3960 is a dual circuit, variable output, series regulator. PNP output transistors allow minimum voltage differential between input and output. Each of the two circuits can be turned on or off independently by using the system logic control. When both circuits are off, the IC keeps a standby state with no supply current. FApplications Audio and video systems, CD and CD-ROM systems, computer peripheral devices, industrial equipment FFeatures 1) Containing two circuits of variable-output series regulator. 2) PNP output transistor characterized by low saturation voltage. 3) Logic control allowing ON / OFF switching of output. 4) No supply current when both circuits are off. FBlock diagram 5) Output current limit circuit protects the IC against short-circuiting damage. 6) Compact HSIP-B12 package allows a large power dissipation. 7) Thermal protection circuit prevents heat damage to the IC. 136 Regulator ICs FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions BA3960 FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 12.0V, ACTIVE 1 : IO = 640mA, ACTIVE 2 : IO = 400mA and R12, R22=3.9kΩ) 137 Regulator ICs FInput pin descriptions and equivalent circuits BA3960 FOutput voltage setting Output voltage setting R11 (21) ) R12 (22) Vref S R12 (22) (1.26V) Example of output voltage setting resistance (VO1 = 6V, VO2 = 8V) R11 = 15kΩ R12 = 3.9kΩ R21 = 22kΩ R22 = 3.9kΩ ...