參數(shù)資料
型號(hào)： TEA1507P
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 穩(wěn)壓器
英文描述： GreenChipII SMPS control IC
中文描述： 2 A SWITCHING CONTROLLER, 205 kHz SWITCHING FREQ-MAX, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 114K
代理商： TEA1507P
2000 Dec 05
5
Philips Semiconductors
Preliminary specification
GreenChip
II SMPS control IC
TEA1507
PINNING
SYMBOL PIN
DESCRIPTION
V
CC
GND
CTRL
DEM
1
2
3
4
supply voltage
ground
control input
input from auxiliary winding for
demagnetization timing, OVP and OPP
programmable current sense input
gate driver output
high voltage safety spacer, not
connected
drain of external MOS switch, input for
start-up current and valley sensing
I
sense
DRIVER
HVS
5
6
7
DRAIN
8
handbook, halfpage
MGU231
TEA1507
1
2
3
4
VCC
GND
CTRL
DEM
DRAIN
HVS
DRIVER
Isense
8
7
6
5
Fig.3 Pin configuration.
FUNCTIONAL DESCRIPTION
The TEA1507 is the controller of a compact flyback
converter, with the IC situated at the primary side. An
auxiliary winding of the transformer provides
demagnetization detection and powers the IC after
start-up.
The TEA1507 operates in multi modes.
The next converter stroke is started only after
demagnetization of the transformer current (zero current
switching), while the drain voltage has reached the lowest
voltage to prevent switching losses (green function). The
primary resonant circuit of primary inductance and drain
capacitor ensures this quasi-resonant operation. The
design can be optimized in such a way that zero voltage
switching can be reached over almost the universal mains
range.
To prevent very high frequency operation at lower loads,
the quasi-resonant operation changes smoothly in fixed
frequency PWM control.
At very low power (standby) levels, the frequency is
controlled down, via the VCO, to a minimum frequency of
about 6 kHz. Typically, 3 Watts can be achieved for a
75 W converter with an output power of 100 mW.
Start-up, mains enabling operation level and
undervoltage lock out
(see Figs. 10 and 11)
Initially, the IC is self supplying from the rectified mains
voltage via pin DRAIN. Supply capacitor C
VCC
is charged
by the internal start-up current source to a level of about
4 V or higher, depending on the drain voltage. Once the
drain voltage exceeds the M-level (mains-dependent
operation-enabling level), the start-up current source will
continue charging capacitor C
VCC
(switch S1 will be
opened), see Fig.2. The IC will activate the power
converter as soon as the voltage on pin V
CC
passes the
V
CC(start)
level. The IC supply is taken over by the auxiliary
winding as soon as the output voltage reaches its intended
level and the IC supply from the mains voltage is
subsequently stopped for high efficiency operation (green
function).
The moment the voltage on pin V
CC
drops below the
V
UVLO
(undervoltage lock out) level, the IC stops switching
and enters a safe restart from the rectified mains voltage.
Inhibiting the auxiliary supply by external means causes
the converter to operate in a stable, well-defined burst
mode.
Supply management
All (internal) reference voltages are derived from a
temperature compensated, on-chip band gap circuit.
handbook, halfpage
VCO
fixed
quasi resonant
power
MGU232
f
6 kHz
175 kHz
Fig.4 Multi mode operation.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1507P/N1,112 功能描述:轉(zhuǎn)換 - 電壓電平 SMPS GREENCHIP II RoHS:否 制造商:Micrel 類(lèi)型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
TEA1520 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:STARplug
TEA1520P 制造商:STMicroelectronics 功能描述:NXP IC 8-PIN DIP
TEA1520P/N2,112 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 POWERPLUG RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TEA1520PN 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 POWERPLUG RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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