參數(shù)資料
型號： TPS2459RHBR
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32
封裝： PLASTIC, QFP-32
文件頁數(shù)： 34/44頁
文件大?。?/td> 983K
代理商： TPS2459RHBR
PRODUCTPREVIEW
SLUS917 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over –40°C
≤ TJ ≤ 85°C, VIN3 =VVDD3 = 3.3 V, VIN12 = VSENP = VSENM = VSETP = 12 V, VEN3=VEN12=logic 1 or open, VAGND =
VGNDA = VGNDB = 0 V, VSUM12 = 6.8 k to GND, , VSUM3 = 3.3 k to GND. All other pins OPEN, all I
2C bits at different values,
all voltages referenced to GND. (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
12-V UVLO
UVLO rising
IN12 rising
8.1
8.5
8.9
V
UVLO hysteresis
IN12 falling
0.44
0.5
0.59
12-V BLOCKING
Turn-on threshold
Measure VSENP – VVOUT
5
10
15
mV
Turn-off threshold
Measure VSENP – VVOUT
–6
–3
0
Turn-off delay
20-mV overdrive, CBLK = 0 pF, tP50-50
200
300
ns
12-V GATE DRIVERS (PASS, BLK)
Output voltage
VVIN12 = VVOUT12 = 10 V
21.5
23
24.5
V
Sourcing current
VVIN12 = VVOUT12 = 10 V, VPASS= VBLK = 17 V
20
30
40
mA
Fast turnoff, VPASS = VBLK = 14 V
0.5
1
A
Sinking current
4 V
≤ VPASS = VBLK ≤ 25 V
6
14
25
mA
Pulldown resistance
In OTSD ( at 150°C )
14
20
26
k
Fast turn-off duration
5
10
15
s
Startup time
IN12 rising to PASS and BLK sourcing
0.25
ms
3.3-V SUMMING NODE
Summing threshold
655
675
695
mV
3.3-V CURRENT LIMIT
On-resistance
IOUT3 = 150 mA
290
500
m
Current limit
RSUM3 = 3.3 k , VVOUT3 = 0 V
170
195
225
mA
Fast trip threshold
240
300
400
Fast turn-off delay
IOUT3= 400 mA, tP50-50
750
1300
ns
Bleed-down resistance
VOUT3= 1.65 V
280
400
500
Bleed-down threshold
75
100
130
mV
3.3-V UVLO
UVLO rising
IN3 rising
2.65
2.75
2.85
V
UVLO hysteresis
IN3 falling
200
240
300
mV
3.3-V BLOCKING
Turn-on threshold
Measure VIN3 – VOUT3
5
10
15
mV
Turn-off threshold
Measure VIN3 – VOUT3
–5
–3
0
mV
VIN3 = 3.3 V, VOUT3 = 3.5 V, ROUT3 = 100 to GND,
ORing turn-on delay time
VORON = 1. Remove 3.5 V from OUT3. Measure time from
300
350
s
VOUT3 decreasing thru 2.9 V to VOUT3 = 3.2 V
Fast turnoff delay time
20 mV overdrive, tP50-50
250
350
ns
Safety gate pulldown current (1)
Slew IN3x, Out3x, 5-V in 1
s
15
mA
SUPPLY CURRENTS (IIN+ISENP+ISENM+ISET+IVDD)
Both channels enabled
IOUT3A = IOUT3B= 0
3.1
4
mA
Both channels disabled
2.0
2.8
THERMAL SHUTDOWN
Whole-chip shutdown
TJ rising, IOUT3A = IOUT3B= 0 A
140
150
temperature
3.3-V channel shutdown
°C
TJ rising, IOUT3A or IOUT3B in current limit
130
140
temperature
Hysteresis
Whole chip or 3.3-V channel
10
(1)
When setting an address bit to a logic 1 the pin should be connected to VINT.
4
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS2459
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