SG6846B Ver la hoja de datos (PDF) - Fairchild Semiconductor

Número de pieza

componentes Descripción

Fabricante

SG6846B

Highly Integrated Green-Mode PWM Controller

Fairchild Semiconductor 

Figure 7. PWM Frequency

Electrical Characteristics (Continued)

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

Symbol

Parameter

Test Condition Min. Typ. Max. Unit

PWM Output Section

DCYMAX

VOL

Maximum Duty Cycle

Output Voltage Low

80

85

90

VDD = 15V, IO = 50mA

1.5

VOH

Output Voltage High

tR

Rising Time

tF

Falling Time

VCLAMP Gate Output Clamping Voltage

Over-Temperature Protection (OTP) Section(1)

VDD = 12V, IO = 50mA 8

GATE = 1nF

GATE = 1nF

VDD = 20V

350

50

18

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

1.00 1.05 1.10

100

14

15

16

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))

%

V

V

ns

ns

V

µA

V

ms

kΩ

kΩ

MΩ

kΩ

(1)

© 2008 Fairchild Semiconductor Corporation

SG6846B • Rev. 1.3.3

8

www.fairchildsemi.com

Share Link: