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參數(shù)資料
| 型號： | L585D1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | CAR ALTERNATOR REGULATOR |
| 中文描述： | 汽車發(fā)電機調(diào)節(jié)器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大小： | 175K |
| 代理商： | L585D1 |
PIN FUNCTIONS
N
°
1
Name
Functions
Alternator Voltage
Sensing
Connection for voltage regulation sensing. The regulation sensitivity is a
function of R1 and is given by :
S =
VA
R1
=
0.5mV
A capacitor connected between these two pins filters the feedback signal from
the regulated output. Typically the input impedance is 15K
.
When this pin is left open circuit the overvoltage threshold is a described in the
specification. Typically the warning lamp is switched on when the voltage at
this pin is greater than 3.5V. This threshold can be modified with a resistor
between either the ground or pin 2.
This pin must be connected to ground.
This pin drives the external darlington disabling it by shorting the current in R
B
to ground.
These pins must be left floating.
Supply Voltage Input
A 7.5V (typical) Zener is present at the input.
A capacitor connected to ground sets the frequency of the internal oscillator.
The frequency is given by :
2-3
Filter Capacitor
4
Alternator Overvoltage
Adjustment
5
6
GND
Darlington Driver
7-8-9
10
N.C.
IC Supply Voltage
11
Oscillator Capacitor
fosc =20 x 10
6
8.4
x
C
osc
This pin must be connected to ground.
Current Driver for External Lamp for Diagnostics.
Internally protected agains short circuits (current limiting), load dump transients
and, by means of a zener, against low energy spikes.
Not connected.
Connection for no charge sensing from the alternator .
The internal low threshold is typically 2.4V. By means of the external divider
R3/R4 the threshold can be adjusted to give the required sensitivity.
Connection for Voltage Battery Sensing
This pin senses a failure of the alternator-battery lead as the voltage difference
V
A
-V
S
. The external resistor R2 limits the current in overvoltage protection.
12
13
GND
Lamp Driver
14
15
NC
Phase Voltage Sensing.
16
Battery Voltage Sensing
L585
3/9
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