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參數(shù)資料
| 型號： | TPS2300IPWG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 10/24頁 |
| 文件大?。?/td> | 644K |
| 代理商： | TPS2300IPWG4 |
www.ti.com
SINGLE-CHANNEL OPERATION
POWER-UP CONTROL
3-CHANNEL HOT-SWAP APPLICATION
0.1
F
IN1 ISET1
RISET1
ISENSE1
RSENSE1
GATE1 DISCH1 VSENSE1
RVSENSE1_TOP
RVSENSE1_BOTTOM
+
FAULT
VO1 or
VO2
FAULT
TIMER IN2 ISET2 ISENSE2 GATE2 DISCH2 VSENSE2
ENABLE
DGND
AGND
RISET2
Rg1
RVSENSE2_TOP
RVSENSE2_BOTTOM
+
VO1
VO2
ENABLE
1
F 10 F
RSENSE2
1
F 10 F
12 V IN1
3.3 V IN2
TPS2311
+
VO3
1
F 10 F
5 V IN3
System
Board
Rg2
PWRGD1
PWRGD2
PWRGD1
PWRGD2
VREG
SLVS275G – FEBRUARY 2000 – REVISED NOVEMBER 2006
Some applications may require only a single external MOS transistor. Such applications should use GATE1 and
the associated circuitry (IN1, ISENSE1, ISET1, DISCH1). The IN2 pin should be grounded to disable the
circuitry associated with the GATE2 pin. The VSENSE2 and PWRGD2 circuitry is unaffected by disabling
GATE2, and may still be used if so desired.
The TPS2310/11 includes a 500 s (nominal) start-up delay that ensures that internal circuitry has sufficient time
to start before the device begins turning on the external MOSFETs. This delay is triggered only upon the rapid
application of power to the circuit. If the power supply ramps up slowly, the undervoltage lockout circuitry
provides adequate protection against undervoltage operation.
Some applications require hot-swap control of up to three voltage rails, but may not explicitly require the sensing
of the status of the output power on all three of the voltage rails. One such application is device bay, where dv/dt
control of 3.3 V, 5 V, and 12 V is required. By using channel 2 to drive both the 3.3-V and 5-V power rails and
channel 1 to drive the 12-V power rail, as is shown below, TPS2310/11 can deliver three different voltages to
three loads while monitoring the status of two of the loads.
Figure 28. Three-Channel Application
Figure 29 shows ramp-up waveforms of the three output voltages.
18
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