ISL78226 Datasheet, PDF (28/94 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
BAT12 AND BAT48 UNDERVOLTAGE DETECTION AND PROTECTION
BAT12 Undervoltage Fault Detection
Threshold at FB_BK Pin. (Falling)
V_{BAT12_UV} Default setting: Individual Fault Response
Control Register Bit (0x00[7]) = 0,
82
85
88
%
(Percentage to the Internal Reference
Internal fault flag setting and XSTAT_VLAG falling
Voltage (1.6V))
Register setting: Individual Fault Response
82
85
88
%
Control Register Bit (0x00[7]) = 1,
BAT12_Undervoltage Detection Control Register
(0x21[2:0]) = 000
0x00[7] = 1, 0x21[2:0] = 001
82.5
%
0x00[7] = 1, 0x21[2:0] = 010
80
%
0x00[7] = 1, 0x21[2:0] = 011
77.5
%
0x00[7] = 1, 0x21[2:0] = 100
75
%
0x00[7] = 1, 0x21[2:0] = 101
72.5
%
0x00[7] = 1, 0x21[2:0] = 110
87.5
%
0x00[7] = 1, 0x21[2:0] = 111
90
%
BAT12 Undervoltage Protection Threshold V_{BAT12_UVP} Internal fault bit setting, XSTAT_VLAG and
37
40
43
%
at FB_BK Pin. (Rising)
XHIC_LAT_F falling, hiccup or latch-off response
(Percentage to the Internal Reference
Voltage (1.6V))
BAT48 Undervoltage Fault Detection
Threshold at FB_BK Pin. (Falling)
(Percentage to the Internal Reference
Voltage (1.6V))
V_{BAT48_UV}
Default setting: Individual Fault Response
Control Register Bit (0x00[7]) = 0,
Internal Fault Flag setting and XSTAT_VLAG
falling
72
75
78
%
Register Setting: Individual Fault Response
72
75
78
%
Control Register Bit (0x00[7]) = 1,
BAT48_Undervoltage Detection Control Register
(0x21[5:3]) = 000
0x00[7] = 1, 0x21[5:3] = 001
71
%
0x00[7] = 1, 0x21[5:3] = 010
67
%
0x00[7] = 1, 0x21[5:3] = 011
63
%
0x00[7] = 1, 0x21[5:3] = 100
58
%
0x00[7] = 1, 0x21[5:3] = 101
54
%
0x00[7] = 1, 0x21[5:3] = 110
79
%
0x00[7] = 1, 0x21[5:3] = 111
83
%
BAT48 Undervoltage Protection Threshold V_{BAT48_UVP} Internal Fault bit setting, XSTAT_VLAG and
47
50
53
%
at FB_BK Pin. (Falling)
XHIC_LAT_F falling, hiccup or latch-off response
(Percentage to the Internal Reference
Voltage (1.6V))
BAT12/BAT48 Undervoltage Detection
and Protection Threshold Hysteresis
V_{FBUV_HYS}
4
%
BAT12/BAT48 Undervoltage Detection
and Protection Delay
tMASK_FBUV ^{Undervoltage detection filter}
1
µs
SWITCHING MODE (DE-MODE/FORCED PWM MODE)/FAULT RESPONSE (HICCUP/LATCH-OFF) SELECT
MODE Pin Output Current (Initialization
Period Only)
I_{O_MODE}
Initialization period only,
26
30
34
µA
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FN8887.0
November 7, 2016