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ISL6740 Datasheet, PDF (9/29 Pages) Intersil Corporation – Flexible Double Ended Voltage and Current Mode PWM Controllers
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ISL6740, 1SL6741
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
Schematic. 9V < VDD < 20 V, RTD = 51.1kΩ, RTC = 10kΩ, CT = 470pF, TA = -40°C to +105°C (Note 3), Typical
values are at TA = +25°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
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
ILOAD = -10mA
ILOAD = 10mA
CLOAD = 100pF (Note 4)
CLOAD = 100pF (Note 4)
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
VREF - OUTA or OUTB,
IOUT = -50mA
OUTA or OUTB - GND, IOUT = 50mA
CGATE = 1nF, VDD = 15V (Note 4)
CGATE = 1nF, VDD = 15V (Note 4)
-
0.5
1.0
V
-
0.5
1.0
V
-
50
100
ns
-
40
80
ns
Thermal Shutdown
(Note 4)
135
145
155
°C
Thermal Shutdown Clear
(Note 4)
120
130
140
°C
Hysteresis, Internal Protection
(Note 4)
-
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:
3. Specifications at -40°C and 105°C are guaranteed by 25°C test with margin limits.
4. This parameter, although guaranteed by characterization or correlation testing, is not 100% tested in production.
5. SYNC pulse width is the greater of this value or the CT discharge time.
6. This is the maximum duty cycle achievable using the specified values of RTC, RTD, and CT. Larger or smaller maximum duty cycles may be
obtained using other values for these components. See Equations 2 through 4.
9
FN9111.4
July 13, 2007
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