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PDF TEA1506T Data sheet ( Hoja de datos )
| Número de pieza | TEA1506T | |
| Descripción | GreenChip SMPS control IC | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
DataSheet4U.com
DataShee
TEA1506P; TEA1506AP;
TEA1506T; TEA1506AT
GreenChip™II SMPS control IC
Product specification
2003 Sep 09
DataSheet4U.com
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1 page  
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Philips Semiconductors
GreenChip™II SMPS control IC
Product specification
TEA1506P; TEA1506AP;
TEA1506T; TEA1506AT
PINNING
SYMBOL
VCC
GND
CTRL
DEM
Isense
DRIVER
HVS
DRAIN
n.c.
PIN
DIP8
SO14
DESCRIPTION
1 2 supply voltage
2 3 ground
3 6 control input
4 7 input from auxiliary winding for demagnetization timing; overvoltage and
overpower protection
5 9 programmable current sense input
6 11 gate driver output
7 12, 13 high voltage safety spacer; not connected
8 14 drain of external MOS switch; input for valley sensing and initial internal
supply
− 1, 4, 5, 8, not connected
10
et4U.com
handbook, halfpage
VCC 1
8 DRAIN
GND 2 TEA1506P 7 HVS
CTRL 3 TEA1506AP 6 DRIVER
DEM 4
5 Isense
MDB506
DataSheet4U.com
handbook, halfpage
n.c. 1
VCC 2
GND 3
n.c. 4
n.c. 5
CTRL 6
DEM 7
14 DRAIN
13 HVS
12 HVS
TEA1506T 11 DRIVER
TEA1506AT
10 n.c.
9 Isense
8 n.c.
MDB507
Fig.3 Pin configuration DIP8.
Fig.4 Pin configuration SO14.
DataShee
DataSheet42U00.c3oSmep 09
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5
5 Page 
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Philips Semiconductors
GreenChip™II SMPS control IC
Product specification
TEA1506P; TEA1506AP;
TEA1506T; TEA1506AT
Control pin protection
If pin CTRL is open-circuit or not connected, a fault
condition is assumed and the converter will stop switching.
Operation will recommence as soon as the fault condition
is removed.
handbook, halfpage
ISS
Soft start-up
To prevent transformer rattle during hiccup, the
transformer peak current is slowly increased by the soft
start function. This can be achieved by inserting a resistor
and a capacitor between pin Isense and the sense resistor
(see Fig.11). An internal current source charges the
capacitor to V = ISS × RSS, with a maximum of
approximately 0.5 V.
The start level and the time constant of the increasing
primary current level can be adjusted externally by
changing the values of RSS and CSS.
0.5 V
start-up
5 Isense RSS
Vocp
CSS
Rsense
MGU237
Fig.11 Soft start.
et4U.com
Iprimary(max) = V-----o--c---p----–--R--(--sI--S-e--nS---s--×e-----R----S---S----)
Driver
τ = RSS × CSS
The driver circuit to the gate of the power MOSFET has a
The charging current ISS will flow as long as the volDtaagteaSonheet4cuUr.rceonmt sourcing capability of 135 mA typical and a current
pin Isense is below approximately 0.5 V. If the voltage on sink capability of 560 mA typical. This permits fast turn-on
pin Isense exceeds 0.5 V, the soft start current source will and turn-off of the power MOSFET for efficient operation.
start limiting the current ISS. At the VCC(start) level, the ISS
current source is completely switched off.
A low driver source current has been chosen to limit the
∆V/∆t at switch-on. This reduces Electro Magnetic
Since the soft start current ISS is supplied from pin DRAIN, Interference (EMI) and also limits the current spikes
the RSS value will not affect the VCC current during start-up. across Rsense.
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| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TEA1506T.PDF ] | |
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