- 您現在的位置：買賣IC網 > PDF目錄382704 > U426B INFRARED DRIVER PDF資料下載
參數資料
| 型號： | U426B |
| 英文描述： | INFRARED DRIVER |
| 中文描述： | 紅外驅動程序 |
| 文件頁數： | 3/6頁 |
| 文件大小： | 60K |
| 代理商： | U426B |
U426B
Rev. A2, 15-Oct-98
3 (6)
Constant Current Driver (DRV)
The constant current driver converts the incoming data
pulses into adequate constant current pulses. A high level
applied to the data input causes a constant current flow
through the IR diode connected to the IRED output. This
current can be programmed via the external resistor (R
S
).
To calculate the output current, use the following
formula:
I
RED
150mV
R
S
Power Supply
The power-supply circuit generates the internal supply
voltage from an external voltage (V
S
= 2.4 V to 12 V).The
Pin V
S
is protected by an internal suppressor diode
against voltages above 13 V. The internal supply voltage
can be switched on/off with a high/low level at the WAKE
input. Setting WAKE to low level switches the circuit
from busy to standby mode which results in a very low
current consumption (2 A). Every change between busy
and standby mode needs a latency of up to 1 ms. Data
transmission and voltage monitoring only takes place
while WAKE remains high.
Monitoring Comparator (COMP)
The monitoring comparator compares the voltage at Pin
MON-I to an internal reference voltage of V
3
= 525 mV
typ. The open collector output transistor is active if the
voltage at Pin MON-I falls below the internal threshold
voltage. The comparator can be used to monitor the pow-
er-supply battery.
t
SB
t
d
t
SB
WAKE
DATA
IRED
MON–I
MON–O
Standby
Standby
internal
circuit state
Output current
Busy
95 9878
Figure 4. Timing diagram
相關PDF資料 |
PDF描述 |
|---|---|
| U4270B-C | Rail-to-rail 1.8V high-speed comparator |
| U4270B-CFS | Rail-to-rail 1.8V high-speed comparator |
| U4275B-AFL | Rail-to-rail 1.8V high-speed comparator |
| U4275B-AFLG3 | Micropower quad CMOS voltage comparators |
| U4276B-AFP | Micropower quad CMOS voltage comparators |
相關代理商/技術參數 |
參數描述 |
|---|---|
| U426B-FP | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:INFRARED DRIVER |
| U4270B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:FM IF limiter amplifier and detector |
| U4270B-C | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:FM IF limiter amplifier and detector |
| U4270B-CFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:FM IF limiter amplifier and detector |
| U4270B-CFSG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:FM IF limiter amplifier and detector |
發布緊急采購，3分鐘左右您將得到回復。