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CS3524AGDWR16 数据表(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS3524AGDWR16 数据表(HTML) 1 Page - Cherry Semiconductor Corporation |
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1 / 6 page  1 Features VIN SYNC CT COMP ISENSE+ VOUT A RT VOUT B EB Gnd EA- EA+ ISENSE- SHUTDOWN EA VREF - + + - COMP EA CL 5V Reference Regulator Flip Flop PWM Latch OSC UV Sense Power to Internal Circuitry T R S CLOCK S RAMP VIN VIN 200mV 1kΩ 10kΩ s Precision Reference Internally Trimmed to ±1% s Current Limit s Undervoltage Lockout s Start-up Supply Current < 4mA s Output to 200mA s 60V Output Capability s Wide Common-mode Input Range for Error and Current Limit Amplifiers s PWM Latch Insures Single Pulse per Period s Double Pulse Suppression s 200ns Shutdown s Guaranteed Frequency s Thermal Shutdown Package Options 16 Lead PDIP & SO Wide Voltage Mode PWM Control Circuit with 200mA Output Drivers 16 15 14 13 12 11 11 10 9 1 2 3 4 5 6 7 8 EA- EA + SYNC ISENSE+ ISENSE- RT CT Gnd VREF VIN EB VOUT B VOUT A EA SHUTDOWN COMP CS3524A Description Block Diagram The CS3524A PWM control circuit retains the same versatile architecture of the industry standard CS3524 (SG3524) while adding substantial improvements. The CS3524 is pin-compatible with “non-A” versions, and in most applica- tions can be directly interchanged. The CS3524A, however, eliminates many of the design restrictions which had pre- viously required additional external circuitry. The CS3524A includes a precision 5V reference trimmed to ±1% accuracy (eliminating the need for potentiometer adjustments), an error amplifier with an output voltage swing extending to 5V, and a current sense amplifier use- ful in either the ground or power sup- ply output lines. The uncommitted 60V, 200mA NPN output pair greatly enhances the output drive capability. The CS3524A features an undervoltage lockout circuit which disables all inter- nal circuitry (except the reference) until the input voltage has risen to 8V. This holds standby current low until turn- on, and greatly simplifies the design of low power, off-line supplies. The turn- on circuit has approximately 600mV of hysteresis for jitter free activation. Other improvements include a PWM latch that insures freedom from multi- ple pulsing within a period, even in noisy environments; logic to eliminate double pulsing on a single output, a 200ns external shutdown capability, and automatic thermal protection from excessive chip temperature. The oscil- lator circuit is usable to 500kHz and is easier to synchronize with an external clock pulse. A Company ® Rev. 10/28/96 Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com |
类似零件编号 - CS3524AGDWR16 |
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类似说明 - CS3524AGDWR16 |
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