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參數(shù)資料
| 型號： | TDA16832G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.7 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | PLASTIC, DSO-14 |
| 文件頁數(shù)： | 24/24頁 |
| 文件大?。?/td> | 614K |
| 代理商： | TDA16832G |
TDA 16831-4
Circuit Description
Version 2.0
9
8 Aug 2002
2
Circuit Description
The TDA 16831-4 is a current mode pulse width modulator with integrated sense
CoolMOS transistor. It fulfills the requirements of minimum external control circuitry for
a flyback application.
Current mode control means that the current through the MOS transistor is compared
with a reference signal derived from the output voltage of the flyback application. The
result of that comparison determines the on time of the MOS transistor.
To minimize external circuitry the sense resistor which gives information about MOS
current is integrated. The oscillator resistor and capacitor which determine the switching
frequency are integrated, too. Special efforts have been made to compensate
temperature dependency and to minimize tolerances of this resistor.
The circuit in detail: (see Figure 3)
Start Up Circuit (uvlo)
Uvlo is monitoring the external supply voltage
V
CC. When VCC is exceeding the on
threshold
V
CCH = 12 V, the bandgap, the bias circuit and the soft start circuit are switched
on. When
V
CC is falling below the off-threshold VCCL = 9 V the circuit is switched off.
During start up the current consumption is about 30 A.
Bandgap (bg)
The bandgap generates an internal very accurate reference voltage of 5.5 V to supply
the internal circuits.
Current Source (bias)
The bias circuit provides the internal circuits with constant current.
Oscillator (osc)
The oscillator is generating a frequency twice the switching frequency
f
switch = 100 kHz.
Resistor, capacitor and current source which determine the frequency are integrated.
The charging and discharging current of the implemented oscillator capacitor is internally
trimmed, in order to achieve a very accurate switching frequency. Temperature
coefficient of switching frequency is very low (see Page 18).
Divider Flip Flop (tff)
Tff is a flip flop which divides the oscillator frequency by one half to create the switching
frequency. The maximum duty cycle is set to Dmax = 0.5.
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA16833 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Off-line SMPS Controller with 600 V Sense CoolMOS on Board |
| TDA16833G | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Off-line SMPS Controller with 600 V Sense CoolMOS on Board |
| TDA16834 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Off-line SMPS Controller with 600 V Sense CoolMOS on Board |
| TDA16846 | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 CTRLR FOR SWITCH MODE PWR SUPPLIES RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| TDA16846_03 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor |
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