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參數(shù)資料
| 型號： | TEA1654 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | GreenChipII SMPS control IC |
| 中文描述： | GreenChipII開關(guān)電源控制IC |
| 文件頁數(shù)： | 5/24頁 |
| 文件大?。?/td> | 119K |
| 代理商： | TEA1654 |
2003 May 12
5
Philips Semiconductors
Product specification
GreenChip
II SMPS control IC
TEA1654
PINNING
FUNCTIONAL DESCRIPTION
The TEA1654 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 TEA1654 operates in multi modes (see Fig.4).
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 complete
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
approximately 24 kHz.
Start-up, mains enabling operation level and
undervoltage lock-out
(see Figs 11 and 12)
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
approximately 4 V (or higher, this is dependent on the
drain voltage/M-level). 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 level V
CC(start)
. The IC
supplyistakenoverbytheauxiliarywindingassoonasthe
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
undervoltage lock-out level V
UVLO
, 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 safe restart mode.
Supply management
All (internal) reference voltages are derived from a
temperature compensated, on-chip band gap circuit.
SYMBOL PIN
VCOadj
I
sense
STDBY
DRIVER
HVS
DESCRIPTION
1
2
3
4
5
VCO adjustment input
programmable current sense input
standby indication or control output
gate driver output
high voltage safety spacer, not
connected
high voltage safety spacer, not
connected
drain of external MOS switch, input for
start-up current and valley sensing
supply voltage
not connected
ground
5 V output
lock input
control input
input from auxiliary winding for
demagnetization timing, OVP and OPP
HVS
6
DRAIN
7
V
CC
n.c.
GND
V
CC(5V)
LOCK
CTRL
DEM
8
9
10
11
12
13
14
handbook, halfpage
TEA1654T
MDB216
1
2
3
4
5
6
7
STDBY
DRIVER
HVS
HVS
DRAIN
DEM
CTRL
LOCK
VCC(5V)
GND
n.c.
VCC
14
13
12
11
10
9
8
VCOadj
Isense
Fig.3 Pin configuration.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1654T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChipII SMPS control IC |
| TEA1654T,118 | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 SW Mode Power Supply Controller 14-Pin RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TEA1654T/N1,518 | 功能描述:轉(zhuǎn)換 - 電壓電平 TEA1654T/SO14/REEL13DP//N1 RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時間: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 |
| TEA1655T/N1,518 | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 IC CTLR SMPS SW MODE RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TEA1656T/N1,118 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 TEA1656T/SO8/REEL13/ 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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