參數(shù)資料
型號(hào)： TD340ID
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： BRUSH DC MOTOR CONTROLLER, PDSO20
封裝： MICRO, PLASTIC, SO-20
文件頁(yè)數(shù)： 3/21頁(yè)
文件大小： 229K
代理商： TD340ID
TD340
11/21
Reversed battery active protection
In full H-bridge configuration, there is a risk in case of power voltage reversal due to the intrinsic diodes
inside the MOS. A passive protection solution is to wire a diode between the H-bridge and the power
supply. Disadvantages are voltage drop and power dissipation.
The TD340 provides support for reversed battery active protection.
An oscillator OSC output is available to allow proper command of a 5th MOS connected upside down.
The MOS must have low threshold voltage because the oscillator output swing is about 6.5V.
In normal conditions, the MOS intrinsic diode supplies power to the driver at startup. When the TD340 is
started, the OSC output enables the MOS to switch on, providing lower voltage drop and lower power
dissipation.
In case of reversed battery, the 5th MOS remains off, and no dangerous voltages can reach the driver nor
the power MOS.
The OSC oscillator can only supply a few mA. It must be loaded with a large impedance, typically 100pF
and 680k.
Figure 5 : Reversed Battery Active Protection Principle
UVLO and OVLO protections
The TD340 includes protections again overvoltage and undervoltage conditions.
Overvoltage is dangerous for the MOS and for the load due to possible excessive currents and power
dissipation.
Undervoltage is dangerous because MOS driving is no more reliable. MOS could be in linear mode with
high ohmic dissipation.
TD340 Under Voltage LockOut and Over Voltage LockOut features protect the system from no
operational power voltage. UVLO and OVLO thresholds are 6.2V and 20V. Hysteresis provides reliable
behavior near the thresholds.
During UVLO and OVLO, MOS are switched off (TD340 in disable state).
M
TD340
Vbatt
1
2
3
4
2
3
VBATT
GND
REVERSED BATTERY
5
MOSFET 5
REMAINS
OFF
ALL MOSFETS AND DRIVER ARE PROTECTED
Driver is not supplied
Osc
M
TD340
Vbatt
Osc
1
2
3
4
2
3
VBATT
GND
~Vbatt
Normal Conditions
Vbatt+6V
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TD340IDT 制造商:STMicroelectronics 功能描述:
TD-35.328MBD-T 功能描述:標(biāo)準(zhǔn)時(shí)鐘振蕩器 35.328MHz 3.3V 25ppm -40C to 85C RoHS:否 制造商:AVX 產(chǎn)品:Standard Clock Oscillators 封裝 / 箱體:7 mm x 5 mm 頻率:75 MHz 頻率穩(wěn)定性:50 PPM 電源電壓:2.5 V 負(fù)載電容: 端接類型:SMD/SMT 最小工作溫度:0 C 最大工作溫度:+ 70 C 輸出格式:LVDS 尺寸: 封裝:Reel 系列:
TD-35.328MBE-T 制造商:TXC Corporation 功能描述:OSC MEMS 35.328 MHZ 3.3V SMD
TD-35.328MCD-T 功能描述:標(biāo)準(zhǔn)時(shí)鐘振蕩器 35.328MHz 2.5V 25ppm -40C to 85C RoHS:否 制造商:AVX 產(chǎn)品:Standard Clock Oscillators 封裝 / 箱體:7 mm x 5 mm 頻率:75 MHz 頻率穩(wěn)定性:50 PPM 電源電壓:2.5 V 負(fù)載電容: 端接類型:SMD/SMT 最小工作溫度:0 C 最大工作溫度:+ 70 C 輸出格式:LVDS 尺寸: 封裝:Reel 系列:
TD-35.328MCE-T 制造商:TXC Corporation 功能描述:OSC MEMS 35.328 MHZ 2.5V SMD
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