ISL6741_14 Datasheet, PDF (9/28 Pages) Intersil Corporation – Flexible Double Ended Voltage and Current Mode PWM Controllers

ISL6740, ISL6741
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” on
page 2 and page 3 and Typical Application Schematics on page 4 to page 6. 9V < V_DD < 20 V, R_TD = 51.1kΩ, R_TC = 10kΩ, 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
(Note 7) TYP
MAX
(Note 7)
UNITS
SS Clamp Voltage
4.35 4.5
4.65
V
Sustained Overcurrent Threshold Voltage (ISL6740) Charged Threshold minus:
0.20 0.25
0.30
V
Overcurrent/Short Circuit Discharge Current
SS = 2V
13
18
23
µA
Fault SS Discharge Current
SS = 2V
-
10.0
-
mA
Reset Threshold Voltage
0.25 0.27
0.33
V
FAULT
Fault High Level Output Voltage (VOH)
Fault Low Level Output Voltage (VOL)
Fault Rise Time
Fault Fall Time
OUTPUT
I_LOAD = -10mA
I_LOAD = 10mA
C_LOAD = 100pF
C_LOAD = 100pF
2.85 3.5
-
V
-
0.4
0.9
V
-
15
-
ns
-
15
-
ns
High Level Output Voltage (VOH)
Low Level Output Voltage (VOL)
Rise Time
Fall Time
THERMAL PROTECTION
V_REF - OUTA or OUTB,
I_OUT = -50mA
OUTA or OUTB - GND, I_OUT = 50mA
C_GATE = 1nF, V_DD = 15V
C_GATE = 1nF, V_DD = 15V
-
0.5
1.0
V
-
0.5
1.0
V
-
50
100
ns
-
40
80
ns
Thermal Shutdown
135 145
155
°C
Thermal Shutdown Clear
120 130
140
°C
Hysteresis, Internal Protection
-
15
-
°C
Reference, External Protection
2.375 2.50
2.625
V
Hysteresis, External Protection
18
25
30
µA
SUPPLY UVLO/INHIBIT
Input Voltage Low/Inhibit Threshold
0.97 1.00
1.03
V
Hysteresis, Switched Current Amplitude
7
10
15
µA
Input High Clamp Voltage
4.8
-
-
V
Input Impedance
1
-
-
MΩ
NOTES:
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
8. SYNC pulse width is the greater of this value or the C_T discharge time.
9. This is the maximum duty cycle achievable using the specified values of R_TC, R_TD, and C_T. Larger or smaller maximum duty cycles may be obtained
using other values for these components. See Equations 2 through 4.
9
FN9111.6
December 2, 2011