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PDF TEA1504 Data sheet ( Hoja de datos )
| Número de pieza | TEA1504 | |
| Descripción | GreenChip SMPS control IC | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TEA1504
GreenChip™ SMPS control IC
Preliminary specification
Supersedes data of 1998 Mar 17
File under Integrated Circuits, IC11
1999 Dec 07
1 page  
Philips Semiconductors
GreenChip™ SMPS control IC
Preliminary specification
TEA1504
The start-up current source also helps to implement the
safe-restart or ‘hiccup’ mode required during system fault
conditions: output short-circuit, output open-circuit, and
overvoltage. Under these fault conditions, the IC inhibits
the normal operation of the system and stops delivering
output power. If the output is short-circuited, Caux is no
longer supplied by the auxiliary winding and its voltage
drops to the UVLO level. If the output open-circuits, the
output voltage rises to the Overvoltage Protection (OVP)
level. The IC detects this state and stops switching the
power MOSFET, which stops re-supplying current to Caux
whose voltage starts to drop. Once the voltage on Caux
drops to the UVLO level, the start-up current source
re-activates and charges Caux to the start-up level, and the
system begins the safe-restart mode cycle, similar to the
normal start-up cycle.
Figure 5 shows the relevant waveforms during safe-restart
mode. To achieve a low ‘hiccup’ duty cycle, the current
charging Caux during the safe-restart mode is lower than it
is during normal start-up (see Irestart(Vaux) and Istart(Vaux)H in
Chapter “Characteristics”). This reduces the risk, during
an output short-circuit condition, of any physical damage
being caused to output secondary winding devices, and of
any breach of safety. The start-up current source is also
important for implementing burst mode standby, explained
in Section “Burst mode standby” (see Irestart(Vaux) in
Chapter “Characteristics”).
handbook, full pagewidth
Vmains
Vo
Co
RDEM
OOB 14
1 Vi
DEM 13
2 HVS
n.c. 12
3 n.c.
GND 11 TEA1504 4 DRIVER
n.c. 10
5 Isense
CTRL 9
6 Vaux
REF 8
DS
7
CCTRL RREF
Caux
power
MOSFET
Rsense
(1)
auxiliary
winding
MGS571
(1) Secondary earthing points are isolated from their primary earthing points.
Fig.3 Typical flyback application.
1999 Dec 07
5
5 Page 
Philips Semiconductors
GreenChip™ SMPS control IC
Preliminary specification
TEA1504
CHARACTERISTICS
Tj = −10 to +110 °C; VVi = 300 V; RREF = 24.9 kΩ (0.1%); VVaux = 8.6 to 13 V. Positive currents flow into the IC.
Negative currents flow out of the IC. All voltages are referenced to GND (pin 11).
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Start-up current source and Vaux management (pins 1 and 6)
Vstart(Vi)(min)
Vstart(Vaux)
VUVLO(Vaux)
Vhys(Vaux)
Ii(Vi)
Ioff(Vi)
Istart(Vaux)L
Istart(Vaux)H
lsup(Vaux)(oper)
Irestart(Vaux)
minimum start-up voltage on Vi
start-up voltage on Vaux
under-voltage lockout on Vaux
hysteresis voltage on Vaux
input current on Vi
off mode current on Vi
low start-up current on Vaux
high start-up current on Vaux
operating supply current on Vaux
restart current on Vaux
Vclamp(Vaux)
clamping voltage on Vaux
Vstart(Vaux) − VUVLO(Vaux)
normal operation
VOOB < 1.95 V
0 V < VVaux < 0.73 V
0.5 V < VVaux < Vstart(Vaux)
no load on DRIVER (pin 4)
in OCP mode
in burst standby mode
lVaux = 5 mA
100
10.4
7.4
2.60
20
150
−270
−5.0
3.5
−600
−2.5
15
−
11
8.05
2.95
60
350
−230
−3.0
3.85
−530
−2.1
−
−
11.6
8.6
3.30
100
550
−190
−1.0
4.2
−460
−1.7
18
V
V
V
V
µA
µA
µA
mA
mA
µA
mA
V
Reference input (pin 8)
Vi(REF)
RREF(oper)
reference input voltage
operating reference resistor
2.37 2.47 2.57 V
16.9 24.9 33.2 kΩ
Oscillator
foscL
foscH
δmax
foscH/foscL
oscillator low frequency
low power operation mode 27.5 29 30.5 kHz
oscillator high frequency
normal mode
66 70 74 kHz
maximum duty cycle
ratio between oscillator high and low
frequencies
f = foscH
78 80 82 %
2.30 2.45 2.60
∆foscH
oscillator high frequency range
with changing RREF
50 70 100 kHz
Demagnetization management (pin 13)
Vth(DEM)
demagnetization comparator
threshold voltage on DEM
VDEM decreasing
50 65 80 mV
tP(DEM-BUF)
Ii(bias)(DEM)
Vclamp(DEM)(neg)
Vclamp(DEM)(pos)
propagation delay from DEM to output
buffer
input bias current on DEM
negative clamp voltage level on DEM
positive clamp voltage level on DEM
VDEM = 65 mV
IDEM = −500 µA
IDEM = 100 µA
300 500 700 ns
−0.5(1) −
−0.1(1) µA
−0.45 −0.35 0
V
2.3 2.6 2.9 V
Sample-and-hold (pin 13)
Ictrl(DEM)(oper)
Ith(sample)
tP(DEM-COMP)
operating control current on DEM
sample threshold current as % of
Ictrl(DEM)
propagation delay from DEM to
current comparator
lREF = 100 µA
90 100 110 µA
78 83 88 %
∆VDEM/∆t positive (500 V/µs) 170
∆VDEM/∆t negative (10 V/µs) 20
450 730
90 160
ns
ns
1999 Dec 07
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet TEA1504.PDF ] | |
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