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參數(shù)資料
| 型號(hào)： | T6801-TAQ |
| 廠商： | ATMEL CORP |
| 元件分類(lèi)： | 其它接口 |
| 英文描述： | Single-channel Driver IC with Driver IC with Monitoring |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, PDSO8 |
| 封裝： | SO-8 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 190K |
| 代理商： | T6801-TAQ |
3
T6801
4761A–AUTO–11/03
Basic Circuitry
The integrated circuit T6801 requires a stabilized supply voltage (V
S
= 5 V ±5%) to com-
ply with its electrical characteristics. An external buffer capacitor of C = 100 nF is
recommended. An integrated 14 V Zener diode between V
S
and ground protects the
supply pin.
The input stage is provided with an integrated 250 k pull-up resistor and can be
directly connected to a microcontroller.
The output stage is an open collector, capable of sinking 20 mA. Recommended exter-
nal components:
Pull-up resistor, R = 1 k
Capacitor to GND, C = 470 pF, see Figure 3
Functional Description
General
ON state: Low level at the input stage activates the output stage.
OFF state: The internal pull-up resistor provides high level to the input comparator and
deactivates the output stage.
A 7 V Zener diode between input pin and GND is capable of ±10 mA clamping current.
Current Limitation of the
Output Stages and
Overtemperature
Shutdown
A temperature-dependent current limitation in the range of 25 to 100 mA protects the
stage in case of a short circuit. Additionally, the chip temperature is monitored. For
T
Chip
> 148 C, the output is disabled and automatically enabled with a hysteresis of
T
Chip
> 5 C.
Transients and Load
Dump
An integrated 28 V Zener diode protects the output stage against transients and load-
dump (Schaffner pulses). With the help of an external 1 k resistor, the output transistor
is capable of handling the corresponding current which flows during each of these condi-
tions. Apart from that, the output is short-circuit and overload protected.
Low-voltage Detection
When the supply voltage is switched on, a power-on reset pulse is generated internally
which disables the output stage until a defined supply-voltage level is reached. The low-
voltage detection is provided with a hysteresis of V
hyst
= 0.5 V typically.
Figure 3.
Application Schematic
V
S
= 5 V
V
I
V
O
C
R
V
Batt
1 k
470 pF
Load
100 nF
Micro-
controller
T6801
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