ISL6721_14 Datasheet, PDF (7/22 Pages) Intersil Corporation – Flexible Single-ended Current Mode PWM Controller

ISL6721
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic on page 2 and page 3. 9V < V_CC = V_C < 20V, R_T = 11kΩ, Ct = 330 pF, T_A = -40 to +105°C (Note 3),
Typical values are at T_A = +25°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
SOFT-START
Charging Current
SS = 2V
-40
-55
-70
µA
Charged Threshold Voltage
4.26
4.50
4.74
V
Initial Overcurrent Discharge Current
Sustained OC Threshold < SS <
30
40
55
µA
Charged Threshold
Overcurrent Shutdown Threshold Voltage
Fault Discharge Current
Charged Threshold minus,
T_A = +25°C
SS = 2V
0.095
0.125
0.155
V
0.25
1.0
-
mA
Reset Threshold Voltage
SLOPE COMPENSATION
T_A = +25°C
0.22
0.27
0.31
V
Charge Current
SLOPE = 2V, 0°C to +105°C
-40°C to +105°C
-45
-53
-65
µA
-41
-53
-65
Slope Compensation Gain
Discharge Voltage
GATE OUTPUT
Fraction of slope voltage added to 0.097
-
0.103
V/V
I_SENSE, T_A = +25°C
Fraction of slope voltage added to 0.082
-
0.118
V/V
I_SENSE (Note 3)
V_RTCT = 4.5V
-
0.1
0.2
V
Gate Output Limit Voltage
Gate VOH
Gate VOL
V_C = 20V, C_GATE = 1nF,
I_OUT = 0mA
11.0
13.5
16.0
V
V_C - GATE, V_C = 10V,
I_OUT = 150mA
-
1.5
2.2
V
GATE - PGND, IOUT = 150mA
-
1.2
1.5
V
IOUT = 10mA
0.6
0.8
Peak Output Current
Output “Faulted” Leakage
Rise Time
V_C = 20V, C_GATE = 1nF (Note 5)
-
1.0
-
A
V_C = 20V, UV = 0V, GATE = 2V
1.2
2.6
-
mA
V_C = 20V, C_GATE = 1nF
1V < GATE < 9V
-
60
100
ns
Fall Time
V_C = 20V, C_GATE = 1nF
1V < GATE < 9V
-
15
40
ns
Minimum ON time
ISET = 0.5V; V_FB = 0V; VC = 11V
-
ISENSE to GATE w/10:1 Divider
RTCT = 4.75V through 1kΩ
(Note 5)
-
110
ns
OVERCURRENT PROTECTION
Minimum ISET Voltage
-
-
0.35
V
Maximum ISET Voltage
1.2
-
-
V
ISET Bias Current
Restart Delay
OV AND UV VOLTAGE MONITOR
V_ISET = 1.00V
T_A = +25°C
-1.0
-
1.0
µA
150
295
445
ms
Overvoltage Threshold
2.4
2.5
2.6
V
Undervoltage Fault Threshold
1.38
1.45
1.52
V
Undervoltage Clear Threshold
1.41
1.53
1.62
V
7
FN9110.6
March 5, 2008