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Lot Of 10 Astec Pwm Controllers AS2916
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Item Code:
DLPASTPWMLOT010
Manufacturer:
Part Number:
LOT10_AS2916
Item Description

Lot of 10 Astec Semiconductor PWM Controller Switching Regulators AS2916. The AS2916 is a dual, full featured, pulse width modulation controller. The second controller is intended to run the auxiliary supply. Both controllers share common oscillator and power up logic. Based on an improved AS3842, the AS2916 provides additional features that reduce component count and improve specifications in a wide range of power supply designs. The added functionality also includes bulk voltage sensing, overvoltage input and soft-start. The PWM function is controlled by the current sense comparator for normal current mode control and a second comparator for voltage mode soft-start. A buffered RAMP signal is available for slope compensation without loading the oscillator. The output stage is a high current totem pole output that sees only 140 ns delay from the PWM comparators. The AS2916 requires less than 25 µA of startup current. The undervoltage lockout (UVLO) thresholds are nominally 13.5 V for turn-on and 7.5 V for turn-off. The oscillator discharge current is trimmed to provide guaranteed duty cycle clamping. The AS2916 has a second low frequency oscillator, which frequency modulates the operating frequency of the PWM by 25%, thus reducing EMI emissions.

Astec Part Number: AS2916

Features:

• Dual PWM Controller
• Ultra low start-up current, less than 25µA
• Main converter soft-start
• Frequency randomizer for improved EMI performance
• Bulk detect circuitry
• Remote ON/OFF control
• Buffered ramp for slope compensation
• Optional auxiliary converter primary regulation
• High main converter drive capability
• Undervoltage lockout circuitry
• Accurate reference
• Standard temperature range extended to 105°C




 

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