器件名称: U2480B
功能描述: Automotive Lamp Outage Monitor
文件大小: 343.28KB 共8页
简 介:U2480B
Automotive Lamp Outage Monitor
Description
The IC U2480B is designed for individual monitoring of 11 lamps in automobiles. Three double comparators and five single comparators, which can be optionally interconnected, permit realization of many monitoring variants. An integrated latch is available to memorize the outage of indicator or brake lamps.
Features
D 10 mV comparator thresholds D Temperature compensated D Voltage characteristic of the lamps is taken into D D
account Input voltage range up to 23 V independent of supply Typical input currents 25 mA, so that protective resistors can be connected in series
D Internal protection measures for pulses
according to ISO TR 7637/1
D ESD according to MIL-SID-883 C test method 3015.7
– Human body model: 4 kV – Machine model: 200 V EMI protection (TEM cell up to 100 V/m)
Ordering Information
Extended Type Number U2480B Package SDIP28 Remarks
Block Diagram
VBatt
3 double comparators
5 single comparators
Stabili– zation
VStab
Logic / Timing
Latch
Output stage
Oscillator
OSC VS
GND
Pilot lamp VStab
13945
TELEFUNKEN Semiconductors Rev. A1, 22-Oct-97
1 (8)
U2480B
Detailed Block Diagram
16 22 V 15 22 V 17 22 V + – Poweron reset Ith Oscillator 7V Divider Clock 1 Tosc x2 T1 Ref E1 Ref E1 E2 Ref E1 Ref E1 K3 K2 Forward and return counter T = 1.2 s Start forward Start return K4 14 K5 T2 T1 Reset Latch for indicator and stop lamps Out Set + – Vout High at counter end High at counter zero Set Out Clock 2 Tosc x20 T2……
