FAN6755UWMY Datasheet, PDF (7/17 Pages) Fairchild Semiconductor – mWSaver™ PWM Controller

Electrical Characteristics
VDD=15 V, TA=25C, unless otherwise noted.
Symbol
Parameter
Conditions
Min. Typ. Max.
Oscillator Section
fOSC Frequency in Normal Mode
Center
Frequency
Hopping
Range
FAN6755W
FAN6755UW
FAN6755W
FAN6755UW
fOSC-G Green-Mode Frequency
tHOP Hopping Period
fDV
Frequency Variation vs. VDD
Deviation
VDD=11 V to 22 V
fDT
Frequency Variation vs.
Temperature Deviation
TA=-40 to 85C=TJ
V_IN Section
VIN-OFF
PWM Turn-Off (Brown-out)
Threshold Voltage
VIN-ON
PWM Turn-On (Brown in)
Threshold Voltage
VIN-Protect
tVIN-Protect
Threshold Voltage of VIN Over-
Voltage Protection
Debounce Time of VIN Over-
Voltage Protection
Current-Sense Section
VLIMIT at
VIN=1 V
VLIMIT at
VIN=3 V
tPD
tLEB
tSS
Threshold Voltage for Current Limit VIN=1 V
Threshold Voltage for Current Limit VIN=3 V
Delay to Output
Leading-Edge Blanking Time
Period During Soft-Start Time
Soft-Start (FAN6755UW)
Steady State
Startup Time
62
65
68
124
130
136
±4.5 ±5.2 ±5.9
±9
±10.4 ±11.8
20
23
26
10
12
14
5
5
0.66 0.70 0.74
VIN-OFF+ VIN-OFF+ VIN-OFF+
0.17 0.20 0.23
5.1
5.3
5.5
60
100
140
0.80 0.83 0.86
0.67 0.70 0.73
100
200
125
150
175
240
290
340
4.0
5.5
7.0
Unit
kHz
kHz
ms
%
%
V
V
V
µs
V
V
ns
ns
ms
V_Limit
VIN-OFF =0.92V
VSENSE =0.83V
VIN-Protect =5.3V
VSENSE =0.7V
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
VIN=1V
VIN=3V
Figure 6. VIN vs. VSENSE
7
VIN
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