ISL78226 Datasheet, PDF (27/94 Pages) Intersil Corporation – Cycle-by-cycle peak current limiting

ISL78226
Electrical Specifications Refer to the Block Diagram (page 11) and Typical Application Schematics (page 13). Operating conditions
unless otherwise noted: V_VIN = 48V, V_V6 = 6V, V_V12 = 12V, V_BAT12 = 12V, V_PVCC = 5.2V, V_VCC = 5.2V, V_EN = 5.0V, and T_A = -40°C to +125°C. Typicals are
at T_A = +25°C. Boldface limits apply across the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 8) TYP (Note 8) UNIT
BAT48 Overvoltage Fault Detection
Threshold at FB_BT Pin. (Rising)
V_{BAT48_OV} Default setting: Individual Fault Response
Control Register Bit (0x00[7]) = 0,
105 108 111
%
(Percentage to the Internal Reference
Internal fault flag setting and XSTAT_VLAG falling
Voltage (1.6V))
Register Setting: Individual Fault Response
105 108 111
%
Control Register Bit (0x00[7]) = 1,
BAT48_Overvoltage Detection Control Register
(0x22[2:0]) = 000
0x00[7] = 1, 0x22[2:0] = 001
110
%
0x00[7] = 1, 0x22[2:0] = 010
113
%
0x00[7] = 1, 0x22[2:0] = 011
117
%
0x00[7] = 1, 0x22[2:0] = 100
121
%
0x00[7] = 1, 0x22[2:0] = 101
125
%
0x00[7] = 1, 0x22[2:0] = 110
106
%
0x00[7] = 1, 0x22[2:0] = 111
104
%
BAT48 Overvoltage Protection Threshold
at FB_BT Pin. (Rising)
V_{BAT48_OVP} Default setting: Individual Fault Response
Control Register Bit (0x00[7]) = 0,
122 125 128
%
(Percentage to the Internal Reference
Internal Fault bit setting, XSTAT_VLAG and
Voltage (1.6V))
XHIC_LAT_F falling, hiccup or latch-off response
Register Setting: Individual Fault Response
Control Register Bit (0x00[7]) = 1,
BAT48_Overvoltage Limit Control Register
(0x22[5:3]) = 000
122 125 128
%
0x00[7] = 1, 0x22[5:3] = 001
129
%
0x00[7] = 1, 0x22[5:3] = 010
133
%
0x00[7] = 1, 0x22[5:3] = 011
138
%
0x00[7] = 1, 0x22[5:3] = 100
142
%
0x00[7] = 1, 0x22[5:3] = 101
146
%
0x00[7] = 1, 0x22[5:3] = 110
150
%
0x00[7] = 1, 0x22[5:3] = 111
121
%
BAT12/BAT48 Overvoltage Detection and
Protection Threshold Hysteresis
V_{FBOV_HYS}
4
%
BAT12/BAT48 Overvoltage Detection and _{tMASK_FBOV} Overvoltage detection filter
Protection Delay
1
µs
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FN8887.0
November 7, 2016