SC4808B-2MSTRT データシートの表示（PDF） - Semtech Corporation

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SC4808B-2MSTRT

High Performance Dual Ended PWM Controller

Semtech Corporation 

SC4808B-2

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VCC = 12V; CL = 100pF; TA = -40°C to 105°C

Parameter

Test Conditions

VCC Under Voltage Lockout

Start Threshold

Hysteresis

Line Under Voltage Lockout

Start Threshold

R23 = 14kΩ, R33 = 10kΩ (see page 11)

Hysteresis

R23 = 14kΩ, R33 = 10kΩ (see page 11)

Soft Start

Internal Soft Start Ramp

Soft Start Duration

Soft Start Delay

Oscillator

Oscillator Frequency

Oscillator Ramp

Rcs = 1kΩ

(See formula in the application

information section on page 18)

Rosc = 11kΩ, Cosc = 200pF

RC pin to GND capacitance

Oscillator Frequency Range

Sync/CLOCK

Clock SYNC Threshold

Sync Frequency Range

Bandgap

Reference Voltage

Reference Current

Overall

Startup Current

Operating Supply Current

VCC Zener Shunt Voltage

VCC < start threshold

FB = 0V, CS = 0V

IDD = 10mA

Min

Typ

Max

4.0

4.40

4.5

100

140

200

-3% VREF +3%

5.6% of

VREF

200

12

140

450

500

550

VREF/2

+0.25

22

50

1000

1.0

F *1.3

osc

2.970

3.125

5

3.280

150

7

16

Unit

V

mV

V

mV

µs/V

µs

µs

KHz

V

pF

KHz

V

KHz

V

mA

µA

mA

V

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