FAN6861 Datasheet, PDF (6/15 Pages) Fairchild Semiconductor – Low-Cost, Highly Integrated, Green-Mode PWM Controller for Peak Power Management

Electrical Characteristics (Continued)
VDD = 15V and TA = 25°C, unless otherwise noted.
Symbol
Parameter
Test Condition
Oscillator Section
fOSC
thop-1
thop-3
fOSC-G
VFB-N
Normal PWM Frequency
Center
Frequency
Jitter Range
VFB > VFB-N
VFB ≥ VFB-N
VFB = VFB-G
Jitter Period 1
VFB ≥ VFB-N
Jitter Period 3
VFB = VFB-G
Green-Mode Minimum Frequency
Beginning of Green-On
Mode at FB Level
Pin, FB Voltage
VFB-G
Beginning of Green-Off
Mode at FB Level
Pin, FB Voltage
SG
VFB-ZDC
fDV
fDT
Slope for Green-Mode Modulation
FB Threshold Voltage for Zero-duty
Frequency Variation vs. VDD Deviation
Frequency Variation vs. Temperature
Deviation
VDD = 11.5V to 20V
TA = -30 to 85°C
PWM Output Section
DCYMAX
VOL
Maximum Duty Cycle
Output Voltage LOW
VDD = 15V, IO =
50mA
VOH
Output Voltage HIGH
VDD = 12V, IO =
50mA
tR
tF
VCLAMP
Rising Time
Falling Time
Gate Output Clamping Voltage
GATE = 1nF
GATE = 1nF
VDD = 20V
Over-Temperature Protection (OTP) Section
IRT
VRTO
VOTP1
Output Current of RT Pin
RT Pin Open Voltage
Threshold Voltage for Over-Temperature
Protection
tDOTP-LATCH Over-Temperature Latch-Off Debounce
VOTP2
Second Threshold Voltage for Over-
Temperature Protection
VFB = VFB-N
VFB = VFB-G
tDOTP2-LATCH
Second Over-Temperature Latch-Off
Debounce
Min. Typ. Max. Unit
60
65
70
±3.7 ±4.2 ±4.7 ^kHz
±1.27 ±1.45 ±1.63
3.9
4.4
4.9
ms
10.2 11.5 12.8 ms
18.0 22.5 25.0 kHz
2.60 2.85 3.10
V
2.0
2.2
2.4
V
65
Hz/mV
1.7
1.9
2.1
V
0
0.02 2.00
%
2
%
65
70
75
%
1.5
V
8
V
230
ns
30
ns
15.00 16.75 18.50 V
90
99
108
μA
3.7
V
0.92 1.00 1.08
V
15
17
19
ms
40
51
62
0.65 0.70 0.75
V
50
100 150
μs
© 2009 Fairchild Semiconductor Corporation
FAN6861 • Rev. 1.0.1
6
www.fairchildsemi.com