Samsung KA7553
The KA7552/3 are switching power control IC for wide operating frequency range. The internal circuits include pulse by pulse current limiting, protection, on/off control by external trigger, low standby current, soft start, and high current totempole output for driving a POWER MOS-FET. When duty is maximum, the input threshold voltage of pin2 & pin8 are not same in KA7552 and KA7553.| Part No. | KA7553 |
|---|---|
| Datasheet | KA7553 Download |
| Manufacturer |  Samsung |
| Description | SMPS CONTROLLER |
| Buy | Stock & Price |
FEATURES
ä● Built-in Drive Circuits for Direct Connection POWER MOSFET (lO= 1.5A)
● Wide Operating Frequency Range (5KHz ~ 600KHz)
● Pulse By Pulse Over Current Limiting
● Over Load Protection
● On/Off Control By External Trigger ORDERING IN FORMATION
● Internal UVLO
● Low Standby Current (Typ. 90uA)
● Soft Start Circuit Device KA7552/3 Package 8 DIP Operating Temperature Î -25 ~ + 85 BLOCK DIAGRAM KA7552/3
ABSOLUTE MAXIMUM RATINGS
Characteristic Supply Voltage Output Current Input Voltage at Overcurrent Detection Pin Input Voltage at FB Pin Input Current at CS Pin Î Total Power Dissipation(Ta = 25 ) Operating Temperature Symbol VCC IO VIN(IS) VIN(FB) IIN(CS) PD TOPR SMPS CONTROLLER Value Unit 30 V ä 1.5 A - 0.3 to 4 V 4 V 2 mA 800 mW - 25 to 85 ÎELECTRICAL CHARACTERISTICS
Î (VCC = 18V, FOSC = 135KHz, TA = 25 , unless otherwise specified) Characteristic Symbol OSCILLATOR SECTION Initial Accuracy Frequency Variation 1 Frequency Variation 2 FOSC LF/LV LF/LV Ramp High Voltage VRH Ramp L...
