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PDF TEA1732CTS Data sheet ( Hoja de datos )

Número de pieza TEA1732CTS
Descripción GreenChip SMPS control IC
Fabricantes NXP Semiconductors 
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TEA1732CTS
GreenChip SMPS control IC
Rev. 1 — 18 March 2014
Product data sheet
1. General description
The TEA1732CTS is a low cost Switched Mode Power Supply (SMPS) controller IC
intended for flyback topologies. The TEA1732CTS operates in peak current and
frequency control mode. Frequency jitter has been implemented to reduce
ElectroMagnetic Interference (EMI). Slope compensation is integrated for Continuous
Conduction Mode (CCM) operation.
The TEA1732CTS IC features OverPower Protection (OPP). The controller accepts an
overpower situation for a limited amount of time.
Mains undervoltage protection (brownout), output OverVoltage Protection (OVP), and
OverTemperature Protection (OTP) can be implemented using a minimal number of
external components.
At low-power levels, the primary peak current is set to 25 % of the maximum peak current.
The switching frequency is reduced to limit the switching losses. The combination of fixed
frequency operation at high output power and frequency reduction at low output power
provides high efficiency over the total load range.
The TEA1732CTS makes the design of low-cost, highly efficient and reliable supplies for
power requirements up to 75 W easier by requiring a minimum number of external
components.
2. Features and benefits
SMPS controller IC enabling low-cost applications
Large input voltage range (12 V to 30 V)
Integrated OverVoltage Protection (OVP) on the VCC pin
Accurate OverVoltage Protection (OVP) via the ISENSE pin
Very low supply current during start-up and restart (10 A typical)
Low supply current during normal operation (0.58 mA typical without load)
Internal overpower time-out
Overpower protection or high/low line compensation
Fixed switching frequency with frequency jitter to reduce EMI
Frequency reduction with fixed minimum peak current to maintain high efficiency at
low output power levels
Frequency increase at peak power operation
Slope compensation for CCM operation
Integrated soft-start

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TEA1732CTS pdf
NXP Semiconductors
TEA1732CTS
GreenChip SMPS control IC
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Fig 4. Start-up sequence, normal operation and restart sequence
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When the voltage on pin VCC drops below the Vth(UVLO) level during normal operation, the
controller stops switching. The TEA1732CTS waits for the rectified mains to charge the
VCC pin using resistor R1.
7.3 Supply management
All internal reference voltages are derived from a temperature compensated on-chip band
gap circuit. Internal reference currents are derived from a trimmed and temperature
compensated current reference circuit.
7.4 External overtemperature protection and mains detect input
(pin PROTECT)
The PROTECT input combines the functions of the external OverTemperature Protection
(OTP) and the mains voltage detection. An internal clock separates the period of
measuring the mains voltage and the period of detecting external OverTemperature
Protection (OTP). In a typical application, the PROTECT pin is connected to the mains via
a resistor. It is connected to ground via a negative temperature coefficient (NTC)
thermistor and a diode.
TEA1732CTS
Product data sheet
When measuring the mains voltage, the PROTECT pin is regulated to 0.25 V so that the
external diode does not conduct any current. The current into the PROTECT pin is
measured and stored. Once the measured current is above the brownin level, the system
is allowed to start switching. If the mains voltage is continuously below the brownout level
for at least 32 ms, a brownout is detected. The system immediately stops switching and
performs a restart. The VCC capacitor is discharged to the UVLO level and then charged
to Vstartup once before switching recommences (See Figure 5).
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 18 March 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
5 of 20

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TEA1732CTS arduino
NXP Semiconductors
TEA1732CTS
GreenChip SMPS control IC
8. Limiting values
Table 3. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
Min
Voltages
VCC supply voltage
continuous
t < 100 ms
0.4
-
VPROTECT
VCTRL
VISENSE
voltage on pin PROTECT
voltage on pin CTRL
voltage on pin ISENSE
current limited
current limited to
2 mA
0.4
0.4
0.7
Currents
IVCC
II(PROTECT)
current on pin VCC
input current on pin
PROTECT
< 10 %
-
1
ICTRL
IISENSE
IDRIVER
General
current on pin CTRL
current on pin ISENSE
current on pin DRIVER
< 10 %
3
10
0.4
Ptot
Tstg
Tj
ESD
total power dissipation
storage temperature
junction temperature
Tamb < 75 C
-
55
40
VESD
electrostatic discharge
voltage
class 1
human body
model
[1] -
changed device
model
-
[1] Equivalent to discharging a 100 pF capacitor through a 1.5 kseries resistor.
9. Thermal characteristics
Max
+30
35
+5
+5.5
+5
0.4
+1
0
+0.5
+1
0.29
+150
+150
4000
750
Table 4.
Symbol
Rth(j-a)
Rth(j-c)
Thermal characteristics
Parameter
thermal resistance from junction
to ambient
thermal resistance from junction
to case
Conditions
in free air; single layer
JEDEC test board
in free air; JEDEC test
board
Typ
259
152
Unit
V
V
V
V
V
A
mA
mA
mA
A
W
C
C
V
V
Unit
K/W
K/W
TEA1732CTS
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 18 March 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
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