CS51312 datasheet(5/18 Pages) CHERRY

5 / 18 page

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Electrical Characteristics: 0˚C < TA < 70˚C; 0˚C < TJ < 125˚C; 9V < VCC1 < 14V; 9V ≤ VCC2 ≤ 20V;

2.0V DAC Code(VID4 = VID3 =VID2 = VID1 = 0, VID0 = 1), CGATE(H) = CGATE(L) = 3.3nF, COFF = 390pF; Unless otherwise stated.

Block Diagram

General Electrical Specifications

VCC1 Monitor Start Threshold

7.9

8.4

8.9

VCC1 Monitor Stop Threshold

7.6

8.1

8.6

Hysteresis

Start - Stop

0.15

0.30

0.60

VCC1 Supply Current

No Load on GATE(H), GATE(L)

9.5

VCC2 Supply Current

No Load on GATE(H), GATE(L)

2.5

4.5

Note 1: The IC power dissipation in a typical application with VCC = 12V, switching frequency fSW = 250kHz, 50nc

MOSFETs and RθJA = 115°C/W yields an operating junction temperature rise of approximately 52°C, and a junction tem-

perature of 77°C with an ambient temperature of 25°C.

Note 2: Guaranteed by design, not 100% tested in production.

VFB

COMP

COFF

OFF

TIME

PWM COMP

DISCHARGE

COMP

VOUT

VID0

VID1

VID2

VID3

VID4

DAC

1.1V

CURRENT LIMIT

86mV

0.25V

FAULT

LATCH

VCC1

OVP

PWRGD

Gnd

GATE(L)

GATE(H)

VCC1

UVLO

NONOVERLAP

LOGIC

VCC2

CS51312 Datasheet(PDF) 5 Page - Cherry Semiconductor Corporation

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