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參數(shù)資料
| 型號(hào)： | TL7700CPSE4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | PLASTIC, SO-8 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大小： | 147K |
| 代理商： | TL7700CPSE4 |
TL7700
SUPPLY-VOLTAGE SUPERVISOR
SLVS220B – JULY 1999 – REVISED AUGUST 2000
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
functional block diagram
Reference
Voltage
+
–
+
–
R
S
Q
+
–
Vs = 500 mV TYP
RESET
GND
CT
SENSE
ICT = 15 A TYP; Is = 2.5 A TYP
VCC
ICT
High:
On
IS
Terminal Functions
TERMINAL
DESCRIPTION
NAME
NO.
DESCRIPTION
CT
1
Timing capacitor connection. This terminal sets the RESET output pulse duration (tpo). It is connected internally to a
15-
A constant-current source. There is a limit on the switching speed of internal elements; even if CT is set to 0,
response speeds remain at approximately 5 to 10
s. If CT is open, the device can be used as an adjustable-threshold
noninverting comparator. If CT is low, the internal output-stage comparator is active and the RESET output transistor
is on. An external voltage must not be applied to this terminal due to the internal structure of the device. Therefore, drive
the device using an open-collector transistor, FET, or 3-state buffer (in the low-level or high-impedance state).
GND
4
Ground. Keep this terminal as low impedance to reduce circuit noise.
NC
3, 6, 7
No internal connection
RESET
8
Reset output. This terminal can be connected directly to a system that resets in the active-low state. A pullup resistor
usually is required because the output is an npn open-collector transistor. An additional transistor should be connected
when the active-high reset or higher output current is required.
SENSE
2
Voltage sense. This terminal has a threshold level of 500 mV. The sense voltage and hysteresis can be set at the same
time when the two voltage-dividing resistors are connected. The reference voltage is temperature compensated to inhibit
temperature drift in the threshold voltage within the operating temperature range.
VCC
5
Power supply. This terminal is used in an operating-voltage range of 1.8 V to 40 V.
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