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TPIC2802 数据表(PDF) 3 Page - Texas Instruments

部件名 TPIC2802
功能描述  OCTAL INTELLIGENT-POWER SWITCH WITH SERIAL INPUT
Download  13 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TPIC2802 数据表(HTML) 3 Page - Texas Instruments

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DESCRIPTION
I/O
TPIC2802
OCTAL INTELLIGENT-POWER SWITCH
WITH SERIAL INPUT
SLIS013 – APRIL 1992
2–3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
PIN
NAME
NO.
GND
8
Ground. Common return for entire chip. The output current from this terminal is potentially as high as 8 A if all outputs
are on. GND is used for both logic and power circuits.
RST
11
I
Reset. An asynchronous reset is provided for the shift register and the parallel latches. This terminal is active when
low and has no internal pullup. When active, it causes the power outputs to turn off. A power-on clear can be
implemented using an RC network to VCC.
SCLK
6
I
Serial clock. This terminal clocks the shift register. The serial output (SO) changes state on the rising edge of SCLK
and serial input (SI) data is accepted on the falling edge.
SI
7
I
Serial Input. A high on this terminal programs a particular output to be off, and a low turns it on.
SIOE
5
I
Serial input-output enable. Data is transferred from the shift registers to the power outputs on the rising edge of this
signal. The falling edge of this signal parallel loads the output voltage sense bits from the power output stages into
the shift register. The output driver SO is enabled when this terminal is low, provided RST is high.
SO
9
O
Serial output. This terminal is the serial 3-state output from the shift register and is in a high-impedance state when
SIOE is high or RST is low. A high for a data bit on this terminal indicates that the corresponding power output (Yn)
is high. This means that the output was programmed to be off the last time a byte was input to the device or that
the output faulted and was latched off by the output voltage-sense indicator. A low on this output indicates that the
corresponding power output (Yn) is low (on output stage or open-circuit condition).
VCC
10
5-V supply voltage
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
4
3
2
1
15
14
13
12
O
Power outputs. These outputs are provided with current limiting and voltage sense for fault indication and protection.
The nominal load current for these outputs is 500 mA, and the current limiting is set to a minimum of 1 A. The
active-low outputs also have voltage clamps set at about 45 V for recirculation of inductive load current. Internal
90-k
Ω pulldown resistors are provided at each output. These resistors hold the output low during an open-circuit
condition.
schematic of inputs and outputs
EQUIVALENT OF ALL LOGIC INPUTS
(SI, SCLK, SIOE, RST)
VCC
Input
GND
VCC
Output
EQUIVALENT OF SERIAL
OUTPUT (SO)
EQUIVALENT OF Y OUTPUTS (Yn)
49 V
VCC
Output
90 k
All resistor and voltage values shown are nominal.


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