ISL6742 Datasheet, PDF (6/18 Pages) Intersil Corporation – Advanced Double-Ended PWM Controller

ISL6742
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” on page 2,
“Typical Application - Telecom Primary Side Control Half-Bridge Converter with Synchronous Rectification” on
page 3 and “Typical Application - High Voltage Input Secondary Side Control Full-Bridge Converter” on page 4.
9V < VDD < 20V, RTD = 10.0kΩ, CT = 470pF, T_A = -40°C to +105°C, Typical values are at T_A = +25°C.
Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature
limits established by characterization and are not production tested. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
RAMP
RAMP Sink Current Device Impedance
RAMP to PWM Comparator Offset
Bias Current
Clamp Voltage
V_RAMP = 1.1V
T_A = +25°C
V_RAMP = 0.3V
(Note 3)
-
-
20
Ω
65
80
95
mV
-5.0
-
-2.0
µA
6.5
-
8.0
V
SOFT-START
Charging Current
SS = 3V
-60
-70
-80
µA
SS Clamp Voltage
4.410
4.500
4.590
V
SS Discharge Current
SS = 2V
10
-
-
mA
Reset Threshold Voltage
ERROR AMPLIFIER
T_A = +25°C
0.23
0.27
0.33
V
Input Common Mode (CM) Range
(Note 3)
0
-
VREF
V
GBWP
(Note 3)
5
-
-
MHz
VERR VOL
VERR VOH
VERR Pull-Up Current Source
I_LOAD = 2mA
I_LOAD = 0mA
VERR = 2.50V
-
-
0.4
V
4.20
-
-
V
0.8
1.0
1.3
mA
EA Reference
EA Reference + EA Input Offset Voltage
T_A = +25°C
0.594
0.600
0.606
V
0.590
0.600
0.612
V
PULSE WIDTH MODULATOR
Minimum Duty Cycle
VERR < 0.6V
-
-
0
%
Maximum Duty Cycle (Per Half-cycle)
VERR = 4.20V, V_RAMP = 0V,
V_CS = 0V (Note 4)
RTD = 2.00kΩ, CT = 220pF
-
94
-
%
-
97
-
%
RTD = 2.00kΩ, CT = 470pF
-
99
-
%
Zero Duty Cycle VERR Voltage
0.85
-
1.20
V
VERR to PWM Comparator Input Offset
VERR to PWM Comparator Input Gain
T_A = +25°C
0.7
0.8
0.9
V
0.31
0.33
0.35
V/V
Common Mode (CM) Input Range
(Note 3)
0
-
4.45
V
OSCILLATOR
Frequency Accuracy, Overall
(Note 3)
165
183
201
kHz
-10
-
+10
%
Frequency Variation with VDD
Temperature Stability
T_A = +25°C, (F_20V- - F_10V)/F_10V
VDD = 10V, |F_-40°C - F_0°C|/F_0°C
(Note 3)
-
0.3
1.7
%
-
4.5
-
%
|F_0°C - F_105°C|/F_25°C
(Note 3)
-
1.5
-
%
Charge Current
Discharge Current Gain
T_A = +25°C, V_CS = 1.8V
-193
19
-200
21
-207
23
µA
µA/µA
6
FN9183.2
October 31, 2008