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参数资料
| 型号： | L585D1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封装： | SO-16 |
| 文件页数： | 5/8页 |
| 文件大小： | 708K |
| 代理商： | L585D1 |
Obsolete
Product(s)
- Obsolete
Product(s)
PROTECTION
Tsh
Darlingtyon
Thermal
Shutdown
Threshold
150
°C
VZen
(pin 10) Zener Voltage
IO = 60mA
IO = 130mA
6
6.2
8
8.2
V
V1dp
Overvoltage Protection
Threshold (7)
Tj = 25
°C
– 30
°C < Tj < + 100°C
25
23
32
38
40
V
I1 3 sc
Lamp Driver Circuit Current
300
1500
mA
Idump
Pin 13 Dump Sustaining Capapility
Current
V1 3 = 110V@ Tj = 25
°C
V1 = 50V@ t = 100ms
200
mA
VZ13
Zener Clamping Voltage
I1 3 = 100mA@
t = < 3ms
110
V
I1 3 = 40mA@
t = < 6ms, full T
TJ = -30
°C
100
90
V
Notes : 1. d = 50 % the duty cycle of the output signal at pin 6.
2. The lamp is switched on with a fixed delay when the alternator voltage becomes higher than VAH. (overcharge indication).
3. Measured 100 ms after turn-on.
4. The lamp is switched on with a fixed delay when the voltage Vp becomes lower than VPL (the alternator is not charging the battery).
5. The lamp is switched on when the cable B is broken (VA - VS becomes higher than VAS).
6. The lamp is switched on when the cable A is broken (IC without power voltage supply).
7. When the voltage at pin 1 is greater than V1 dp the internal darlington of the lamp is switched off.
CIRCUIT OPERATION
The L585 alternator regulator performs two main functions : regulation control and fault diagnostics.
REGULATION
The alternator voltage is compared with a reference
voltage in an error amplifier (see block diagram), the
output of which determines the duty cycle of the ex-
ternal darlington. This darlington switches the cur-
rent in the excitation coil of the alternator.
The switching frequency is fixed and is set by the ex-
ternal capacitor COSC (see application circuit). Ca-
pacitive positive feedback and a monostable elimi-
nates spurious switching caused by contact bounce.
The base current delivered to the external darlington
it set by the resistor RB (see application circuit) and
must be dimensioned according to the charac-
teristics of this darlington and the maximum coil cur-
rent.
DIAGNOSTIC
This circuit receives information from the battery, the
alternator and one alternator phase. It indicates
anomolous conditions by driving a 3 W lamp. To pre-
vent spurious fault warnings some indications are
not displayed immediately but are delayed by a fixed
time. No external components are needed to imple-
ment this delay since it is produced internally by di-
viding the internal oscillator with an eight-stage di-
vider to give a delay of 128 periods. For a one sec-
ond delay the oscillator frequency must be 128 Hz.
The lamp is driven after a delay when the following
conditions occur : no charge, break or short circuit
in the alternator sense wire.
The diagnostic lamp is driven immediately when the
cable connecting the alternator to the battery is bro-
ken (Va-Vbatt above 2.6 typ.) or when the IC is with-
out power supply (VCE sat of the lamp driver is 2.4 V
typ. in this case).
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
L585
5/8
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