SC4812 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC4812

Current Mode PWM Controller with Integrated Start-up Circuit and Op Amp

Semtech Corporation 

SC4812

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VCC = 12V, a 10uF capacitor connects VCC to GND, VCS = 0, VIN = 48V, a 0.1uF capacitor connects SS/SHDN to GND, OUT = open

circuit, FB = GND, TA = TJ = -40 to +125ºC. Typical values are at TA = 25ºC

Parameter

Test Conditions

Min

Typ

Max

Units

Current Limit

CS Threshold Voltage

419

465

510

mV

CS Input Bias Current

Propagation Delay to Gate

0 ≤ VCS ≤ 2V

-1

70

1

µA

nS

CS Blanking Time

70

nS

Soft Start

SS Source Current

SS Sink Current

VSS/SHDN = 0

4

6

8

µA

1

mA

Shutdown Threshold

Output

VSS/SHDN falling

VSS/SHDN rising

0.25

0.5

0.6

V

0.61

0.7

0.8

Peak Source Current

570

mA

Peak Sink Current

1000

mA

Rise Time

Fall Time

Thermal Shutdown

CL = 1nF

CL = 1nF

45

nS

35

nS

Thermal Shutdown Temperature

150

°C

Thermal Hysteresis

25

°C

Note:

(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.

 2007 Semtech Corp.

4

www.semtech.com

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