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參數(shù)資料
| 型號： | PTB48511BAZ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 72 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, DIP-8 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 544K |
| 代理商： | PTB48511BAZ |
www.ti.com
DEVICE INFORMATION
SLTS219F – FEBRUARY 2004 – REVISED MARCH 2007
TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME
NO.
The positive input supply for the module with respect to VI (or ground return). When powering the module from
+VI
(1)
1
a –48 V telecom central office supply, this input is connected to the primary system ground.
This pin is used when the PTB4851x and PTB4850x DC/DC converter modules are used together. Connecting
Sync In
2
this pin to the Sync Out of the PTB4850x module allows the PTB4851x to be synchronized to the same switch
conversion frequency as the PTB4850x.
This is an open-collector (open-drain) negative logic input that enables the module output. This pin is
Enable (2)
3
referenced to –VI. A logic 0 at this pin enables the module's outputs, and a high impedance disables the
outputs. If this feature is not used the pin should be connected to –VI.
Note: Connecting this input directly to the EN Out pin of the PTB4850x enables the output voltages from both
converters (PTB4850x and PTB4851x) to power up in sequence.
The negative input supply for the module, and the 0 VDC reference for the Enable, and Sync In signals. When
-VI
4
the module is powered from a +48-V supply, this input is connected to the 48-V Return.
The positive output supply voltage, which is referenced to the COM node. The voltage at VO1 has the same
VO1
5
magnitude, but is the complement to that at VO2.
The negative output supply voltage, which is referenced to the COM node. The voltage at VO2 has the same
VO2
8
magnitude, but is the complement to that at VO1.
The secondary return reference for the module's regulated output voltages. This node is dc isolated from the
COM
6
input supply pins.
Using a single resistor, this pin allows the magnitude of both VO1 and VO2 to be adjusted together, either higher
VOAdj
7
or lower than their preset value. If not used, this pin should be left open circuit.
(1)
Shaded functions indicate signals that are referenced to -VI
(2)
Denotes negative logic: Open = Output Off, –VI = Normal operation.
6
Copyright 2004–2007, Texas Instruments Incorporated
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