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ISL6721A Datasheet, PDF (9/24 Pages) Intersil Corporation – Flexible Single-ended Current Mode PWM Controller
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ISL6721A
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic on page 3 and page 4. 9V < VCC = VC < 20V, RT = 11kΩ, CT = 330 pF. Typical values are at
TA = +25°C. Boldface limits apply over the operating temperature range, -40°C to +105°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 9)
TYP
(Note 9)
UNITS
Undervoltage Clear Threshold
1.96
2.01
2.10
V
Undervoltage Hysteresis Voltage
20
50
100
mV
UV Bias Current
OV Bias Current
THERMAL PROTECTION
VUV = 2.10 V
VOV = 2.00 V
-1.0
-
1.0
µA
-1.0
-
1.0
µA
Thermal Shutdown
(Note 10)
120
130
140
°C
Thermal Shutdown Clear
(Note 10)
105
120
135
°C
Hysteresis
(Note 10)
-
10
-
°C
NOTES:
9. 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.
10. This parameter, although guaranteed by characterization or correlation testing, is not 100% tested in production.
11. This is the VCC current consumed when the device is active but not switching. Does not include gate drive current.
12. This is the maximum duty cycle achievable using the specified values of RT and CT. Larger or smaller maximum duty cycles may be obtained
using other values for RT and CT. See Equations 1, 2, 3 and 4.
Typical Performance Curves
11.0.00022
1.0010
00.9.99988
00.9.99955
00.9.99933
00.9.99911-40
-10
20
50
80 110
TEMPERATURE (°C)
FIGURE 1. EA REFERENCE VOLTAGE vs TEMPERATURE
11.0.00022
1.0010
00.9.99988
00.9.99955
00.9.99933
00.9.99911-40
-10
20
50
80 110
TEMPERATURE (°C)
FIGURE 2. VREF REFERENCE VOLTAGE vs TEMPERATURE
1.002
0.996
0.989
0.983
0.976
0.970
-40 -10
20
50
80 110
TEMPERATURE (°C)
FIGURE 3. OSCILLATOR FREQUENCY vs TEMPERATURE
9
103
100pF
100
220pF
330pF
470pF
680pF
1000pF
10
2000pF
10 20 30 40 50 60 70 80 90 100
RT (kΩ)
FIGURE 4. RESISTANCE FOR CT CAPACITOR VALUES GIVEN
FN6797.0
August 23, 2011
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