AN8037

Voltage Regulators AN8027, AN8037 AC-DC switching power supply control IC with standby mode s Overview The AN8027 and AN8037 are ICs developed for selfexcited switching regulator of RCC local resonance control type. These ICs are designed to achieve stability and high efficiency over a wide input voltage range and loads range (light loads to heavy loads), for supporting input levels used worldwide and improved conformance with energy conservation laws. 2.4±0.25 6.0±0.3 3.3±0.25 Unit: mm 8 0.5±0.1 7 23.3±0.3 6 5 4 1.5±0.25 1.5±0.25 1.4±0.3 s Features Support improved conformance with energy conservation laws by providing two operating modes. 0.3 +0.1 –0.05 Standby mode (light loads): 3.0±0.3 Achieves better efficiency due to reduced frequency . Normal mode: SIP009-P-0000C Achieves high efficiency in RCC local resonance operation with zero-cross detection. Incorporating an input voltage compensation function available to a wide input range for worldwide use. This function compensates the maximum on-period in inverse proportion to the input voltage. Incorporating a timer latch function. The time period can be adjusted according to the overload in normal mode or standby mode. This function makes it possible to protect the IC from damage that may be caused by the short-circuiting of the IC's external capacitor for the timer. Incorporating an overvoltage protection function. (detects at VCC pin) Incorporating a pulse-by-pulse overcurrent protection funct...