U426B Datasheet, PDF (1/6 Pages) TEMIC Semiconductors – INFRARED DRIVER

Infrared Driver
U426B
Description
The U426B is an IR-driver IC for IR data communication.
The circuit contains a programmable constant current
source (DRV) to drive the IRED. The current is pro-
grammed by an external resistor (R_S). With the internal
comparator (COMP) an external voltage can be moni-
tored. The low-power standby mode, controlled by means
of the WAKE input, makes the circuit well suited for bat-
tery-powered systems.
Features
D Programmable constant current 200 mA to 1.2 A
D Signal frequency up to 500 kHz
D Low-power standby mode
D Internal voltage comparator
D Wide voltage range 2.4 V to 12 V
Applications
D Keyless entry systems
D Remote control
D Wireless data communication
Ordering Information
Extended Type Number
U426B-FP
Package
SO8
Remarks
V_Batt
Controller
DATA
WAKE
MON–O
MON–I
U426B
I_RED
DRV
R_S
COMP
Figure 1. Block diagram for an IR transmitter
95 9947
Rev. A2, 15-Oct-98
1 (6)