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參數(shù)資料
| 型號： | TL7700CPSRG4 |
| 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： | GREEN, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 20/20頁 |
| 文件大?。?/td> | 554K |
| 代理商： | TL7700CPSRG4 |
DETAILED DESCRIPTION
Sense-Voltage Setting
VCC
Vs
GND
CT
RESET
RL
R1
R2
Ct
VCC
RESET
GND
SENSE
Sense-Voltage Hysteresis Setting
www.ti.com........................................................................................................................................................... SLVS220E – JULY 1999 – REVISED MARCH 2009
The SENSE terminal input voltage, Vs, of the TL7700 typically is 500 mV. By using two external resistors, the
circuit designer can obtain any sense voltage over 500 mV. In Figure 19, the sensing voltage, Vs', is calculated
as:
Vs' = Vs × (R1 + R2)/R2
Where:
Vs = 500 mV typ at TA = 25°C
At room temperature, Vs has a variation of 500 mV ± 5 mV. In the basic circuit shown in Figure 19, variations of
[±5 ± (R1 + R2)/R2] mV are superimposed on Vs.
Figure 19.
If the sense voltage (Vs') does not have hysteresis in it, and the voltage on the sensing line contains ripples, the
resetting of TL7700 is unstable. Hysteresis is added to the sense voltage to prevent such problems. As shown in
Vhys = Is × R1
Where:
Is = 2.5 A typ at TA = 25°C
At room temperature, Is has variations of 2.5 mA ± 0.5 mA. Therefore, in the circuit shown in Figure 19, Vhys has
variations of (±0.5 × R1) mV. In circuit design, it is necessary to consider the voltage-dividing resistor tolerance
and temperature coefficient in addition to variations in Vs and Vhys.
Copyright 1999–2009, Texas Instruments Incorporated
9
Product Folder Link(s): TL7700
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| TL7700CPW | 功能描述:監(jiān)控電路 VOLTAGE SUPERVISOR RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TL7700CPWE4 | 功能描述:監(jiān)控電路 VOLTAGE SUPERVISOR RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TL7700CPWG4 | 功能描述:監(jiān)控電路 Voltage Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TL7700CPWR | 功能描述:監(jiān)控電路 Supply V Adj RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TL7700CPWRE4 | 功能描述:監(jiān)控電路 VOLTAGE SUPERVISOR RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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