ISL6721ABZ-T Datasheet, PDF (8/22 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
Undervoltage Hysteresis Voltage
20
50
100
mV
UV Bias Current
OV Bias Current
THERMAL PROTECTION
V_UV = 2.00 V
V_OV = 2.00 V
-1.0
-
1.0
µA
-1.0
-
1.0
µA
Thermal Shutdown
(Note 5)
120
130
140
°C
Thermal Shutdown Clear
(Note 5)
105
120
135
°C
Hysteresis
(Note 5)
-
10
-
°C
NOTES:
3. Specifications at -40°C and +105°C are guaranteed by +25°C test with margin limits.
4. This is the V_CC current consumed when the device is active but not switching. Does not include gate drive current.
5. Limits should be considered typical and are not production tested.
6. 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
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
8
FN9110.6
March 5, 2008