ISL6742B_14 Datasheet, PDF (9/20 Pages) Intersil Corporation – Advanced Double-Ended PWM Controller

ISL6742B
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” on page 5,
“Typical Application - Telecom Primary Side Control Half-Bridge Converter with Synchronous Rectification” on page 6 and “Typical Application - High
Voltage Input Secondary Side Control Full-Bridge Converter” on page 7. 9V < VDD < 16V, RTD = 10.0kΩ, CT = 470pF, T_A = -40°C to +105°C, Typical values
are at T_A = +25°C. Boldface limits apply across the operating temperature range, -40°C to +105°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 7)
TYP
(Note 7)
UNITS
RAMP
RAMP Sink Current Device Impedance
RAMP to PWM Comparator Offset
Bias Current
Clamp Voltage
V_RAMP = 0.2V
T_A = +25°C
V_RAMP = 0.3V
(Note 8)
-
-
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 8)
0
-
VREF
V
GBWP
(Note 8)
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 9)
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 8)
0
-
4.45
V
OSCILLATOR
Frequency Accuracy, Overall
(Note 8)
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 8)
-
0.3
1.7
%
-
4.5
-
%
|F_0°C - F_105°C|/F_25°C
(Note 8)
-
1.5
-
%
Charge Current
Discharge Current Gain
T_A = +25°C, V_CS = 1.8V
-189
19
-200
21
-211
23
µA
µA/µA
CT Valley Voltage
Static Threshold
0.75
0.80
0.88
V
CT Peak Voltage
Static Threshold
2.75
2.80
2.88
V
CT Pk-Pk Voltage
Static Value
1.92
2.00
2.05
V
RTD Voltage
1.97
2.00
2.03
V
9
FN8565.0
January 31, 2014