ISL6840IUZ-T Datasheet, PDF (8/13 Pages) Intersil Corporation – Improved Industry Standard Single-Ended Current Mode PWM Controller

ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” and
“Typical Application” schematic on pages 3 and 4. V_DD = 15V (Note 12), R_t = 10kΩ, C_t = 3.3nF,
T_A = -40°C to +105°C (Industrial) or T_A = 0°C to +70°C (Commercial), Typical values are at T_A = +25°C.
Boldface limits apply over the operating temperature range, -40°C to +105°C or 0°C to +70°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN
(Note 9) TYP
MAX
(Note 9) UNITS
Maximum Duty Cycle
ISL6840, ISL6842, ISL6843
94
96
-
%
ISL6841, ISL6844, ISL6845
47
48
-
%
Minimum Duty Cycle
ISL6840, ISL6842, ISL6843
-
-
0
%
ISL6841, ISL6844, ISL6845
-
-
0
%
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 is the V_DD current consumed when the device is active but not switching. Does not include gate drive current.
11. Limits established by characterization and are not production tested.
12. Adjust V_DD above the start threshold and then lower to 15V.
Typical Performance Curves
1.02
1.01
1.00
0.99
0.98
0.97
-40
-10
20
50
80
110
TEMPERATURE (°C)
FIGURE 1. FREQUENCY vs TEMPERATURE
1.001
1.000
0.999
0.998
0.997
0.996
0.995
-40 -25 -10
5 20 35 50 65 80 95 110
TEMPERATURE (°C)
FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE
1.002
1.000
0.998
0.996
0.994
-40 -25 -10 5 20 35 50 65 80 95 110
TEMPERATURE (°C)
FIGURE 3. EA REFERENCE vs TEMPERATURE
10³
100pF
100
220pF
330pF
470pF
1.0nF
10
2.2nF
3.3nF
4.7nF
1
10 20 30 40 50 60 70 80 90 100
RT (kΩ)
FIGURE 4. RESISTANCE FOR CT CAPACITOR VALUES GIVEN
8
FN9124.11
February 23, 2012