ISL6755 Datasheet, PDF (6/17 Pages) Intersil Corporation – ZVS Full-Bridge PWM Controller with Average Current Limit

ISL6755
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic. 9V < V_DD < 20V, RTD = 10.0kΩ, CT = 470pF, T_A = -40°C to +105°C, Typical values are at
T_A = +25°C; 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. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
CTBUF Offset from GND
CTBUF VOH
CTBUF VOL
SOFT-START
V_CT = 0.8V
0.34
0.40
0.44
V
ΔV(I_LOAD = 0mA, I_LOAD = -2mA),
-
V_CT = 2.6V
-
0.10
V
ΔV(I_LOAD = 2mA, I_LOAD = 0mA),
-
V_CT = 0.8V
-
0.10
V
Charging Current
SS = 3V
-60
-70
-80
µA
SS Clamp Voltage
4.410
4.500
4.590
V
SS Discharge Current
SS = 2V
10
-
-
mA
Reset Threshold Voltage
OUTPUTS
T_A = +25°C
0.23
0.27
0.33
V
High Level Output Voltage (VOH)
Low Level Output Voltage (VOL)
Rise Time
Fall Time
UVLO Output Voltage Clamp
THERMAL PROTECTION
I_OUT = -10mA, V_DD - VOH
-
I_OUT = 10mA, VOL - GND
-
C_OUT = 220pF, V_DD = 15V (Note 4)
-
C_OUT = 220pF, V_DD = 15V (Note 4)
-
V_DD = 7V, I_LOAD = 1mA (Note 6)
-
0.5
1.0
V
0.5
1.0
V
110
200
ns
90
150
ns
-
1.25
V
Thermal Shutdown
(Note 4)
-
140
-
°C
Thermal Shutdown Clear
(Note 4)
-
125
-
°C
Hysteresis, Internal Protection
(Note 4)
-
15
-
°C
NOTES:
4. Limits established by characterization and are not production tested.
5. This is the maximum duty cycle achievable using the specified values of RTD and CT. Larger or smaller maximum duty cycles may be obtained
using other values for these components. See Equations 1 through 5.
6. Adjust V_DD below the UVLO stop threshold prior to setting at 7V.
6
FN6442.1
September 29, 2008