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參數(shù)資料
| 型號(hào)： | MC33293ATV |
| 廠商： | MOTOROLA INC |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | QUAD LOW SIDE SWITCH |
| 中文描述： | 3 A 4 CHANNEL, BUF OR INV BASED PRPHL DRVR, PZFM15 |
| 封裝： | PLASTIC, SIP-15 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 236K |
| 代理商： | MC33293ATV |
MC33293A
10
MOTOROLA ANALOG IC DEVICE DATA
PIN DESCRIPTION
Pin
Function
Description
1
Output 2
This is one of four open drain power MOSFET output connections. The load is connected from
this pin to the positive voltage supply.
2
Output 1
This is one of four open drain power MOSFET output connections. The load is connected from
this pin to the positive voltage supply.
3
Input 1
This input controls the turn ON and turn OFF of Output 1 when the Single/Dual pin is at a logic
low level. It is a CMOS input with an internal active pull-down employed for noise immunity.
4
Input 2
This input controls the turn ON and turn OFF of Output 2 when the Single/Dual pin is at a logic
low level. It is a CMOS input with an internal active pull-down employed for noise immunity.
5
Input 1 & 2
This input controls the turn ON and turn OFF of Output 1 and Output 2 when the Single/Dual
select pin is at a logic high level. It is a CMOS input with an internal active pull-down employed
for noise immunity.
6
Single/Dual
Select
This input selects between the single (one input controls one output) mode and the dual
(one input controls two outputs) mode of operation.
7
VPWR
The power (voltage and current) to operate the IC is supplied through this pin. The MC33293A
is designed to operate over a voltage range of 5.5 V to 30 V.
8
Ground
IC ground reference pin.
9
N/C
No connection.
10
Fault
One of three fault conditions, Output-On Open-Load, Output-Off Open-Load or Over-Current are
reported at this output. A logic low state signals the existence of a fault condition. This output
has an internal active pull-up and does not require an external pull-up resistor.
11
Input 3 & 4
This input controls the turn ON and turn OFF of Output 3 and Output 4 when the Single/Dual
select pin is at a logic high level. It is a CMOS input with an internal active pull-down employed
for noise immunity.
12
Input 4
This input controls the turn ON and turn OFF of Output 4 when the Single/Dual pin is at a logic
low level. It is a CMOS input with an internal active pull-down employed for noise immunity.
13
Input 3
This input controls the turn ON and turn OFF of Output 3 when the Single/Dual pin is at a logic
low level. It is a CMOS input with an internal active pull-down employed for noise immunity.
14
Output 3
This is one of four open-drain power MOSFET output connections. The load is connected from
this pin to the positive voltage supply.
15
Output 4
This is one of four open-drain power MOSFET output connections. The load is connected from
this pin to the positive voltage supply.
CIRCUIT DESCRIPTION
Introduction
The MC33293A is a four output low side switch originally
intended for use in automotive applications as a fuel injection
driver. This circuit can be used in a variety of applications. It
is parametrically specified over a battery voltage range of
9.0 V to 14.5 V, but is designed to operate over a
considerably wider range of 5.5 V to 30 V. The design
incorporates the use of logic level MOSFETs as output
devices which are fully enhanced at a gate voltage of 5.0 V,
eliminating the need for internal charge pumps. Each output
is identically sized and is independentin operation. The
efficiency of each output device is such that with as little as
9.0 V of VPWR applied, the RDS(on) is 0.18
typically, at room
temperature and increases to only 0.22
as VPWR
decreases to 5.5 V.
All inputs of the MC33293A are CMOS and have individual
11
μ
A internal active pull-downs. This eliminates the need for
external pull-down resistors to prevent false switching due to
noise on the input control lines. This also ensures that at
power-up, no load is turned on before a logic high appears on
an input pin. Fault reporting is through the use of an
open-drain MOSFET having a 100
μ
A internal active pull-up.
All inputs incorporate true logic(or positive logic). This
means that whenever an input is in a logic low state (< 0.8 V)
the corresponding output will be in an OFF state. Conversely,
whenever an input is in a logic high state (> 3.0 V), the
corresponding output will be in an ON state.
Single/Dual Select
The Single/Dual Select pin can be used to switch between
completely independent control and control of the outputs in
pairs. Whenever the Single/Dual Select pin is in a logic low
state, Inputs 1, 2, 3 and 4 control Outputs 1, 2, 3 and 4,
respectively. In this mode, only Inputs 1, 2, 3 and 4 can
exercise individual control over their respective output.
Hence the term “single select” mode of operation. Input 1 & 2
(Pin 5) and Input 3 & 4 (Pin 11) have nocontrol whenever the
Single/Dual Select pin is in a logic low state.
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