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TEA1533T 데이터시트 PDF




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부품번호 TEA1533T 기능
기능 GreenChipTMII SMPS control IC
제조업체 NXP Semiconductors
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TEA1533T 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
DATA SHEET
TEA1533T; TEA1533AT
GreenChipTMII SMPS control IC
Product specification
Supersedes data of 2002 May 31
2002 Aug 23




TEA1533T pdf, 반도체, 판매, 대치품
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VCC 2
3
GND
S1
SUPPLY
MANAGEMENT
M-level
internal UVLO start
supply
VOLTAGE
CONTROLLED
OSCILLATOR
FREQUENCY
CONTROL
START-UP
CURRENT SOURCE
DEMAG
SHORT
PROTECTION
OCP
VALLEY
Iprot(DEM)
clamp
LOGIC
50
mV
100
mV
UP/DOWN
COUNTER
OVER-
VOLTAGE
PROTECTION
14
DRAIN
12, 13
7
HVS
n.c.
DEM
6
CTRL
Iprot(CTRL)
1
POWER-ON
RESET
2.5 V
burst
detect
OVER-
TEMPERATURE
PROTECTION
LOGIC
SQ
UVLO R Q
SQ
VCC < 4.5 V
or UVLO
(TEA1533AT)
RQ
DRIVER
LEB
blank
OCP
11 DRIVER
soft
start
S2
Iss
0.5 V
9 Isense
TEA1533T
TEA1533AT
MAXIMUM
ON-TIME
PROTECTION
short
winding
0.88 V
OVERPOWER
PROTECTION
MGU500
Fig.2 Block diagram.

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TEA1533T 전자부품, 판매, 대치품
Philips Semiconductors
GreenChipTMII SMPS control IC
Product specification
TEA1533T; TEA1533AT
handbook, full pagewidth
CTRL
1.5 V VCTRL current
comparator
DRIVER
X2
DRIVER
Isense
Vx
150 mV
V
I
OSCILLATOR
fosc
fmax
fmin
cycle
skipping
dV2
1
0
dV1 Vx (mV)
150
Vx (mV)
MGU510
The voltage levels dV1 and dV2 are fixed in the IC to 50 mV (typical) and 18 mV (typical) respectively.
Fig.7 The cycle skipping circuitry.
Demagnetization
The system will be in discontinuous conduction mode all
the time. The oscillator will not start a new primary stroke
until the secondary stroke has ended.
Demagnetization features a cycle-by-cycle output
short-circuit protection by immediately lowering the
frequency (longer off-time), thereby reducing the power
level.
Demagnetization recognition is suppressed during the first
tsuppr time. This suppression may be necessary in
applications where the transformer has a large leakage
inductance, at low output voltages and at start-up.
If pin DEM is open-circuit or not connected, a fault
condition is assumed and the converter will stop operating
immediately. Operation will recommence as soon as the
fault condition is removed.
If pin DEM is shorted to ground, again a fault condition is
assumed and the converter will stop operating after the
first stroke. The converter will subsequently enter the safe
restart mode. This situation will persist until the
short-circuit is removed.
Minimum and maximum ‘on-time’
The minimum ‘on-time’ of the SMPS is determined by the
Leading Edge Blanking (LEB) time. The IC limits the
‘on-time’ to 50 µs. When the system desires an ‘on-time’
longer than 50 µs, a fault condition is assumed (e.g.
removed Ci in Fig.11), the IC will stop switching and enter
the safe restart mode.
2002 Aug 23
7

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