Details, datasheet, quote on part number: CS3524AGNW16
PartCS3524AGNW16
CategoryPower Management => PWM Controllers => Voltage Mode PWM Controllers
TitleVoltage Mode PWM Controllers
DescriptionVoltage Mode PWM Control Circuit With 200ma Output Drivers
CompanyON Semiconductor
DatasheetDownload CS3524AGNW16 datasheet
  

 

Features, Applications
CS3524A Voltage Mode PWM Control Circuit with 200 mA Output Drivers

The CS3524A PWM control circuit retains the same versatile architecture of the industry standard CS3524 (SG3524) while adding substantial improvements. The CS3524 is pin­compatible with "non­A" versions, and in most applications can be directly interchanged. The CS3524A, however, eliminates many of the design restrictions which had previously required additional external circuitry. The CS3524A includes a precision 5.0 V reference trimmed to ±1% accuracy (eliminating the need for potentiometer adjustments), an error amplifier with an output voltage swing extending 5.0 V, and a current sense amplifier useful in either the ground or power supply output lines. The uncommitted 200 mA NPN output pair greatly enhances the output drive capability. The CS3524A features an undervoltage lockout circuit which disables all internal circuitry (except the reference) until the input voltage has risen 8.0 V. This holds standby current low until turn­on, and greatly simplifies the design of low power, off­line supplies. The turn­on circuit has approximately mV of hysteresis for jitter free activation. Other improvements include a PWM latch that insures freedom from multiple pulsing within a period, even in noisy environments; logic to eliminate double pulsing on a single output, 200 ns external shutdown capability, and automatic thermal protection from excessive chip temperature. The oscillator circuit is usable to 500 kHz and is easier to synchronize with an external clock pulse. Features Precision Reference Internally Trimmed to ±1% Current Limit Undervoltage Lockout Start­Up Supply Current 4.0 mA Output 60 V Output Capability Wide Common­Mode Input Range for Error and Current Limit Amplifiers PWM Latch Insures Single Pulse per Period Double Pulse Suppression 200 ns Shutdown Guaranteed Frequency Thermal Shutdown

= Assembly Location = Wafer Lot = Year = Work Week
EA­ EA+ SYNC ISENSE+ ISENSE­ RT CT GND 1 VREF VIN EB VOUTB VOUTA EA SHUTDOWN COMP
VIN SYNC RT OSC CT RAMP COMP EA­ EA+ 200 mV ISENSE+ CL ISENSE­ + COMP S UV Sense CLOCK

Rating Supply Voltage (VIN) Collector Supply Voltage (VCC) Output Current (Each Output) Reference Output Current Oscillator Charging Current Power Dissipation = 25°C Power Dissipation = +25°C Derate for Case Temperature above +25°C Storage Temperature Range Lead Temperature Soldering 1. 10 seconds max. 2. 60 seconds max above 183°C *The maximum package power dissipation must be observed. Wave Solder (through hole styles only) Note 1. Reflow (SMD styles only) Note 2. Value +150 260 peak 230 peak Unit mA mW mW/°C °C

Characteristic Turn­On Characteristics Input Voltage Turn­On Threshold Turn­On Current Operating Current Turn­On Hysteresis (Note 3.) Reference Section Output Voltage Line Regulation Load Regulation Temperature Stability (Note 3.) Short Circuit Current Output Noise Voltage (Note 3.) Long Term Stability (Note 3.) Oscillator Section Initial Accuracy Temperature Stability (Note 3.) Minimum Frequency Maximum Frequency Output Amplitude (Note 3.) Output Pulse Width (Note 3.) Ramp Peak Ramp Valley Error Amplifier Section Input Offset Voltage Input Bias Current Input Offset Current Common Mode Rejection Ratio Power Supply Rejection Ratio Output Swing Open Loop Voltage Gain Gain­Bandwidth (Note 3.) Current Limit Amplifier Input Offset Voltage Input Offset Voltage Input Bias Current Common Mode Rejection Ratio Power Supply Rejection Ratio VSENSE 15 V VIN 40 V VCM 5.5 V VIN 40 V Minimum Total Range VOUT 0 dB VSENSE = VO; unless otherwise specified 25°C, EA Set for Max. Output Over Operating Temperature Range = 25°C VIN 20 mA Over Operating Range VREF f 10 kHz, 125°C, 1000 Hrs. mV mA µVRMS mV Operating Range after Turn­On ­ VIN Turn­On 100 mV VIN mA V Test Conditions Min Typ Max Unit

3. These parameters are guaranteed by design but not 100% tested in production.

 

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