SG6846G Просмотр технического описания (PDF) - Fairchild Semiconductor

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SG6846G

Highly Integrated Green-Mode PWM Controller

Fairchild Semiconductor 

Electrical Characteristics (Continued)

VDD = 15V and TA = 25°C unless otherwise noted.

Symbol

Parameter

Test Condition Min. Typ. Max. Unit

PWM Output Section

DCYMAX Maximum Duty Cycle

80

85

90

%

VOL

Output Voltage LOW

VDD = 15V, IO = 50mA

1.5

V

VOH

Output Voltage HIGH

VDD = 12V, IO = 50mA 8

V

tR

Rising Time

GATE = 1nF

350

ns

tF

Falling Time

GATE = 1nF

50

ns

VCLAMP Gate Output Clamping Voltage

VDD = 20V

18

V

Over-Temperature Protection (OTP) Section(1)

IRT

VRTTH

tDOTP-LATCH

RRT-OFF

Output Current of RT Pin

Threshold Voltage for OTP

Over-Temperature Latch-off Debounce

Equivalent Impedance of RT for OTP(1)

RI = 26kΩ

RI = 26kΩ

RI = 26kΩ

64

70

76

µA

1.00 1.05 1.10 V

100

µs

14

15

16

kΩ

RI Section

RINOR

RI Operating Range

13

36

RIMAX Maximum RI Value for Protection

10

RIMIN

Minimum RI Value for Protection

6

Note:

1. The relationship between RRT-OFF and RI is: RRT-OFF = VOTP-LATCH-OFF / IRT = VRT / (70μA × 26 / RI (KΩ)) .

kΩ

MΩ

kΩ

(1)

© 2008 Fairchild Semiconductor Corporation

SG6846G • Rev. 1.0.2

7

www.fairchildsemi.com

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