CS51311 参数 Datasheet PDF下载

CS51311

Electrical Characteristics: 0˚C < T

A

< 70˚C; 0˚C < T

J

< 125˚C; 9V < V

CC

< 14V;

2.0V DAC Code (V

ID4

= V

ID3

=V

ID2

= V

ID1

= 0, V

ID0

= 1), C

GATE(H)

= C

GATE(L)

= 3.3nF, C

OFF

= 390pF; Unless otherwise stated.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

s

General Electrical Specifications

V

CC

Monitor Start Threshold

V

CC

Monitor Stop Threshold

Hysteresis

V

CC

Supply Current

Start - Stop

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

7.9

7.6

0.15

8.4

8.1

0.30

12

8.9

8.6

0.60

20

V

V

V

mA

Note 1: The IC power dissipation in a typical application with V

CC

= 12V, switching frequency f

SW

= 250kHz, 50nc

MOSFETs and R

θJA

= 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.

Block Diagram

V

FB

1.1V

-

+

-

+

EA

COMP

PWM COMP

+

-

OFF

TIME

C

OFF

V

OUT

+

-

0.25V

V

ID0

V

ID1

V

ID2

V

ID3

V

ID4

GATE(H)

DAC

UVLO

V

CC

+

-

+

-

PWRGD

5

+

-

CURRENT LIMIT

+

86mV

-

-

+

DISCHARGE

COMP

R

Q

FAULT

LATCH

S

NONOVERLAP

LOGIC

GATE(L)

Gnd