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U6432B Schematic ( PDF Datasheet ) - ATMEL Corporation

Teilenummer U6432B
Beschreibung Low-power Flasher IC with 18-mOMShunt
Hersteller ATMEL Corporation
Logo ATMEL Corporation Logo 




Gesamt 10 Seiten
U6432B Datasheet, Funktion
Features
Temperature and Voltage Compensated Frequency
Warning Indication of Lamp Failure by Means of Frequency Doubling only in Direction
Mode
Voltage Dependence of the Car Indicator Lamps also Compensated for Lamp Failure
Relay Output with High Current-carrying Capacity and Low Saturation Voltage
Load-dump Protection
Minimum Lamp Load for Flasher Operation ³ 1 W
Low Susceptibility to EMI
Extremely Low Standby Current of 10 µA
Protection According to ISO/TR 7637/1 Level 4 with External Capacitor (C2)
Description
The U6432B is an advanced automotive flasher IC which provides low standby cur-
rent. Its basic function is equal to Atmel’s flasher IC U6043B but low current
consumption and frequency doubling disabling make outstanding differences.
Low-power
Flasher IC with
18-mW Shunt
U6432B
4725A–AUTO–06/03
1






U6432B Datasheet, Funktion
Electrical Characteristics
Tamb = 25°C; typical values under normal operation in application circuit Figure 1, VS = 12 V (Pins 2 and 6);
reference point ground (-31), unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Supply voltage range
Pin 2 and 6
VS 9
16.5
Supply current, dark phase
Pins 2 and 6
IS 4.5 8
Supply current, stand-by
Pins 2 and 6
IS 10
Supply current, bright phase
Pins 2 and 6
IS 7.0 11
Relay output, saturation voltage
IO = 150 mA
VS = 9 V, Pin 3
VO
1.0
Relay output reverse current
Pin 3
IO 0.1
Relay coil resistance
RL 60
Start delay
First bright phase
ton
10
Frequency determining resistor
R1 6.8
510
Frequency determining capacitor
C1 47
Frequency tolerance
Normal flashing, basic frequency f1 not
including the tolerances of the external
components R1 and C1
Df1
-5
+5
Bright period
Basic frequency f1
VS = 9 to 15 V
Df1 47
53
Bright period
Control frequency f2
VS = 9 to 15 V
Df2 37
45
Frequency increase
Lamp failure, VS = 9 to 15 V
f2 2.15 ´ f1
2.3 ´ f1
Control signal threshold 1
VS = 15 V
VS = 9 V
VS = 12 V, Pin 7
50 53 57
VR3 43 45 47
47 49 51
Control signal threshold 2
VR3 15
Lamp load
PL 1
Unit
V
mA
mA
mA
V
mA
W
ms
kW
µF
%
%
%
Hz
mV
mV
W
6 U6432B
4725A–AUTO–06/03

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