ISL6752_06 Datasheet, PDF (7/16 Pages) Intersil Corporation – ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

ISL6752
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic. 9V < VDD < 20V, RTD = 10.0kΩ, CT = 470pF, T_A = -40°C to 105°C (Note 3), Typical values are at
T_A = 25°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
VADJ Delay Time
T_A = 25°C (OUTLx Delayed)
VADJ = 0
280
300
320
ns
VADJ = 0.5V
92
105
118
ns
VADJ = 1.0V
61
70
80
ns
VADJ = 1.5V
48
55
65
ns
VADJ = 2.0V
41
50
58
ns
T_A = 25°C (OUTLxN Delayed)
VADJ = VREF
280
300
320
ns
VADJ = VREF - 0.5V
86
100
114
ns
VADJ = VREF - 1.0V
59
68
77
ns
VADJ = VREF - 1.5V
47
55
62
ns
VADJ = VREF - 2.0V
41
48
55
ns
THERMAL PROTECTION
Thermal Shutdown
(Note 4)
130
140
150
°C
Thermal Shutdown Clear
(Note 4)
115
125
135
°C
Hysteresis, Internal Protection
(Note 4)
-
15
-
°C
NOTES:
3. Specifications at -40°C and 105°C are guaranteed by 25°C test with margin limits.
4. Guaranteed by design, not 100% tested in production.
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 - 3.
6. Adjust VDD below the UVLO stop threshold prior to setting at 7V.
Typical Performance Curves
1.02
1.01
1
0.99
0.98
-40 -25 -10 5 20 35 50 65 80 95 110
TEMPERATURE (°C)
FIGURE 1. REFERENCE VOLTAGE vs TEMPERATURE
25
24
23
22
21
20
19
18
0
200
400
600
800
RTD CURRENT (µA)
1000
FIGURE 2. CT DISCHARGE CURRENT GAIN vs RTD CURRENT
7
FN9181.2
April 4, 2006