參數(shù)資料
型號： TPS51427ARHBR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數(shù)： 40/42頁
文件大小： 2131K
代理商： TPS51427ARHBR
www.ti.com .................................................................................................................................................. SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008
ELECTRICAL CHARACTERISTICS (continued)
Over recommended free-air temperature range, VV5DRV = 5 V, VVIN = 12 V (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT LIMIT
TRIPx Adjustment Range
0.2
2.0
V
4.75
5.25
TRIPx Source Current
0.2 V < VTRIPx < 2 V, TA = +25°C
5
A
(–5%)
(+5%)
TRIPx Current Temperature
Coefficient on the basis of TA = +25°C
(3)
2900
ppm/°C
13
27
GND – LLx, VTRIPx = 0.2 V
20
(–35%)
(+35%)
42.5
57.5
GND – LLx, VTRIPx = 0.5 V
50
(–15%)
(+15%)
Current-Limit Threshold (Positive,
mV
Adjustable)
93
107
GND – LLx, VTRIPx = 1 V
100
(–7%)
(+7%)
190
210
GND – LLx, VTRIPx = 2 V
200
(–5%)
(+5%)
93
107
Current-Limit Threshold (Positive,
VTRIPx = 5.0 V, GND – LLx (no temperature
100
mV
Default)
compensation)
(–7%)
(+7%)
High threshold
3.0
3.2
3.3
V
Fixed 100-mV OCL TRIPx
Threshold Voltage
Hysteresis
40
70
100
mV
With respect to valley current limit threshold,
Current Limit Threshold (Negative)
–100%
SKIPSEL = 5 V
Zero-Crossing Current Limit
SKIPSEL = 0 V, 2 V, or OPEN, GND – LLx
–3.5
0
3.5
mV
Threshold
GATE DRIVERS
Source, VBSTx-DRVHx = 0.1 V
1.0
3.6
DRVHx Gate-Driver
On-Resistance
Sink, DRVHx-LLx = 0.1 V
0.8
2.6
Source, V5DRV-DRVLx = 0.1 V
1.2
4.0
DRVLx Gate-Driver On-Resistance
Sink, DRVLx-PGND = 0.1 V
0.6
1.5
DRVHx Gate-Driver Source
VBSTx-LLx = 5 V, DRVHx = 2.0 V(3)
1.8
A
Current
DRVHx Gate-Driver Sink Current
VBSTx-LLx = 5 V, DRVHx = 2.0 V(3)
1.6
A
DRVLx Gate-Driver Source
V5DRV-PGND = 5 V, DRVLx = 2.0 V(3)
1.4
A
Current
DRVLx Gate-Driver Sink Current
V5DRV-PGND = 5 V, DRVLx = 2.0 V(3)
2.6
A
DRVHx low (DRVHx = 1 V) to DRVLx high (DRVLx = 4
20
30
50
ns
V), LLx = –0.05 V
Dead Time
DRVLx low (DRVLx = 1 V) to DRVHx high (DRVHx = 4
25
40
60
ns
V), LLx = –0.05 V
Internal BST_ Switch
IVBSTx = 10 mA, V5DRV = 5 V, TA = +25°C
10
On-Resistance
VBSTx Leakage Current
VVBSTx = 35 V, LLx = 28 V
0.01
2.0
A
(3)
Ensured by design. Not production tested.
Copyright 2008, Texas Instruments Incorporated
7
Product Folder Link(s): TPS51427A
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