SG6742 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
SG6742 Datasheet PDF : 14 Pages
| |||
Highly Integrated Green-Mode PWM Controller
Current-Sense Section
Symbol Parameter
ZSENSE
Input Impedance
VSTHFL
Current Limit Flatten Threshold Voltage
VSTHVA
Current Limit Valley Threshold Voltage
tPD
Delay to Output
tLEB
Leading-Edge Blanking Time
VS-SCP
Threshold Voltage for SENSE Short-circuit
Protection
tD-SSCP
Delay Time for SENSE Short-circuit
Protection
Test Condition
VSTHFL–VSTHVA
VSENSE < 0.15V
Product Specification
SG6742
Min.
0.87
0.18
275
0.10
100
Typ.
12
0.90
0.22
100
350
0.15
150
Max.
0.93
0.26
200
425
0.20
200
Unit
KΩ
V
V
ns
ns
V
µs
GATE Section
Symbol Parameter
DCYMAX
VGATE-L
VGATE-H
tr
Maximum Duty Cycle
Gate Low Voltage
Gate High Voltage
Gate Rising Time
tf
Gate Falling Time
IGATE-SOURCE
VGATE-CLAMP
Gate Source Current
Gate Output Clamping Voltage
Test Condition
VDD=15V, IO=50mA
VDD=12V, IO=50mA
VDD=15V, CL=1nF
VDD=15V, CL=1nF
VDD=15V, GATE=6V
VDD=22V
Min.
60
8
150
30
250
Typ.
65
250
50
Max.
70
1.5
350
90
18
Unit
%
V
V
ns
ns
mA
V
RT Section
Symbol Parameter
IRT
VRTTH1
Output Current from the RT Pin
Over-Temperature Protection Threshold
Voltage
VRTTH2
Over-Temperature Protection Threshold
Voltage
tD-OTP1
tD-OTP2
Over-Temperature Latch-off Debounce
Over-Temperature Latch-off Debounce
Test Condition
0.7V ＜ VRT ＜ 1.05V, after
12ms latch off
VRT ＜ 0.7V, after 100µs
latch off
VRTTH2 ＜ VRT ＜ VRTTH1
VRT < VRTTH2
Min.
92
1.015
0.65
8
60
Typ.
100
1.050
0.70
12
100
Max.
108
1.085
0.75
16
140
Unit
µA
V
V
ms
µs
Over Temperature Protection (OTP)
Symbol
TOTP
TRestart
Parameter
Protection Junction Temperature*
Restart Junction Temperature**
Test Condition
Min.
Typ.
135
TOTP -25
Max.
Unit
°C
°C
* When activated, the output is disabled and the latch is turned off.
** This is the threshold temperature for enabling the output again and resetting the latch after over-temperature protection has
been activated.
© System General Corp.
Version 1.0.1 (IAO33.0083.B0)
-6-
www.sg.com.tw • www.fairchildsemi.com
September 24, 2007
Share Link: 