ISL6726 Datasheet, PDF (8/20 Pages) Intersil Corporation – Active Clamp Forward PWM Controller

ISL6726
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to the Block Diagram on page 4 and the
Typical Application schematics on pages 5 and 6. 8V < V_D < 20V, R_TC = 10.0kΩ, C_T = 470pF, T_A = -40°C to +105°C, Typical values are at T_A = +25°C.
Boldface limits apply over the operating temperature range, -40°C to +105°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 7)
TYP
(Note 7) UNITS
IOUT Buffer Gain
IOUT VOH
T_A = +25°C
3.90
4.00
4.12
V/V
Δ_VOH, (VOH_ILOAD=0µA - VOH_{ILOAD=-300µA}), CS = 0.5V,
ISET = 1.00V
0.05
0.2
V
IOUT VOL
SLOPE COMPENSATION
I_LOAD = 100µA, CS = 0V, ISET = 1.00V
0.05
0.1
0.15
V
Charge Current
SLOPE = 2V
-90
-100
-110
µA
Slope Compensation Gain
Fraction of slope voltage added to CS
0.190
0.200
0.210
V/V
SLOPE Discharge Device, r_DS(ON)
SLOPE Range, Linear Response
50
Ω
0
2.5
V
PULSE WIDTH MODULATOR
Minimum Duty Cycle
MODE = 5V, VERR < 0.6V
0
ns
MODE = 0V, VERR < 0.6V
270
300
350
ns
Maximum Duty Cycle
4.8 < VERR < VREF, UV = 4.2V, DCLIM > 4.0V
76
80
84
%
RTC = 25.5kΩ, CT = 220pF
80
%
SS to PWM Comparator Input Gain
0.23
0.25
0.27
V/V
VERR to PWM Comparator Input Gain
0.28
0.30
0.32
V/V
VERR to PWM Comparator Input Offset
0.60
0.80
1.00
V
OUTM TO OUTAC DELAY TIMING
DELAY Gain
DELAY Range
Overlap, T_A = +25°C
Non-Overlap, T_A = +25°C
1.54
1.54
50
1.83
1.79
2.11
2.11
500
ns/kΩ
ns/kΩ
ns
DELAY Disable, High
4.9
V
DELAY Disable, Low
0.100
V
OSCILLATOR
Frequency Accuracy
Frequency Variation with VDD
Frequency Variation with UV
T_A = +25°C
326
338
349
kHz
T_A = +105°C, |(F_20V - F_8V)/F_8V|, UV = 2.00V (Note 7)
0.1
0.3
%
T_A = +25°C, |(F_20V - F_8V)/F_8V|, UV = 2.00V
0.2
0.6
%
T_A = -40°C, |(F_20V - F_8V)/F_8V|, UV = 2.00V (Note 7)
0.6
8.0
%
T_A = +25°C, |(F_4.25V - F_2.00V)/F_2.00V|
VDD = 8V
%
0.1
1.5
VDD = 20V
0.3
5.2
%
Temperature Stability
UV = 2.0V, VDD = 8V
0.5
1.5
%
Charge Current Gain
RTC = 10.0kΩ, 100kΩ
1.88
2.0
2.12
µA/µA
Discharge Current Gain
RTC = 10.0kΩ, 100kΩ
6.0
7.2
8.2
µA/µA
CT Valley Voltage
Static operation
0.75
0.80
0.85
V
CT Peak Voltage
Static operation
UV = 2.00V
2.30
2.40
2.50
V
UV = 4.00V
3.80
4.00
4.20
V
8
FN7654.0
January 31, 2011