tea1733mt NXP Semiconductors, tea1733mt Datasheet

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tea1733mt

Manufacturer Part Number
tea1733mt
Description
Tea1733mt Greenchip Smps Control Ic
Manufacturer
NXP Semiconductors
Datasheet
1. General description
2. Features and benefits
2.1 Features
The TEA1733MT is a low cost Switched Mode Power Supply (SMPS) controller IC
intended for flyback topologies. It operates in fixed frequency mode. Frequency jitter has
been implemented to reduce ElectroMagnetic Interference (EMI). Slope compensation is
integrated for Continuous Conduction Mode (CCM) operation.
The TEA1733MT IC includes OverPower Protection (OPP). This enables the controller to
operate under overpower situations for a limited amount of time.
Two pins, VINSENSE and PROTECT, are reserved for protection purposes. Input
UnderVoltage Protection (UVP) and OverVoltage Protection (OVP), output 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
and the switching frequency is reduced to limit 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 TEA1733MT enables low-cost, highly efficient and reliable supplies for power
requirements up to 75 W to be designed easily and with a minimum number of external
components.
TEA1733MT
GreenChip SMPS control IC
Rev. 1 — 4 February 2011
SMPS controller IC enabling low-cost applications
Large input voltage range (12 V to 30 V)
Very low supply current during start-up and restart (typically 10 μA)
Low supply current during normal operation (typically 0.55 mA without load)
Overpower or high/low line compensation
Adjustable overpower time-out
Adjustable overpower restart timer
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
Slope compensation for CCM operation
Low and adjustable OverCurrent Protection (OCP) trip level
Preliminary data sheet

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tea1733mt Summary of contents

Page 1

... GreenChip SMPS control IC Rev. 1 — 4 February 2011 1. General description The TEA1733MT is a low cost Switched Mode Power Supply (SMPS) controller IC intended for flyback topologies. It operates in fixed frequency mode. Frequency jitter has been implemented to reduce ElectroMagnetic Interference (EMI). Slope compensation is integrated for Continuous Conduction Mode (CCM) operation. ...

Page 2

... Package Name TEA1733MT SO8 TEA1733MT Preliminary data sheet Description plastic small outline package; 8 leads; body width 3.9 mm All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Version SOT96-1 © NXP B.V. 2011. All rights reserved ...

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... Q R soft start latch VINSENSE S stop Q R latch reset latch DIGITAL CONTROL All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control overpower 2.5 V driver OTP OSCILLATOR MODULATION ANALOG SLOPE CONTROL COMPENSATION prothigh driver ...

Page 4

... All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC 8 OPTIMER 7 CTRL TEA1733MT 6 PROTECT 5 VINSENSE 001aan247 © NXP B.V. 2011. All rights reserved ...

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... NXP Semiconductors 7. Functional description 7.1 General control The TEA1733MT contains a flyback circuit controller, a typical configuration of which is shown Θ Z1 Fig 3. Typical configuration 7.2 Start-up and UnderVoltage LockOut (UVLO) Initially, the capacitor on the VCC pin is charged from the high voltage mains via resistor R3 ...

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... NXP Semiconductors VINSENSE Fig 4. When the voltage on pin VCC drops below the V controller stops switching. A VCC undervoltage causes the TEA1733MT to be latched in the off-state. 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 ...

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... At low output power, the switching frequency is also reduced (see 7.12). The maximum duty cycle is limited (typical). (see Figure ctrl(Ipeak) current (11 μA typical) is sourced from the OPTIMER pin. If the IO(OPTIMER) voltage is reached, the TEA1733MT is latched in the off-state. prot(OPTIMER ISENSE ...

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... Peak current control t leb V sense(max) V ISENSE Leading edge blanking 8). All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Figure 6). 014aaa931 (V) CTRL Figure 7). t 014aaa932 © NXP B.V. 2011. All rights reserved. ...

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... Overpower compensation Section 7.10). Figure 6 and f sw (kHz) switching frequency Frequency control All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control (V) VINSENSE 014aaa933 Figure 3) on the ISENSE pin is Figure 9 (V) ...

Page 10

... OTP is a latched protection and it can be reset by removing the voltage on pin VCC. TEA1733MT Preliminary data sheet All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC © NXP B.V. 2011. All rights reserved ...

Page 11

... Thermal characteristics thermal resistance from junction to ambient in free air; JEDEC test thermal resistance from junction to case All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Conditions Min −0.4 continuous t < 100 ms - − ...

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... VINSENSE high(PROTECT) = 200 μA I I(PROTECT) for minimum flyback peak current for maximum flyback peak current = 1.4 V CTRL V = 3.7 V CTRL All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Min Typ Max 18.6 20.6 22.6 11.2 12.2 13 startup - ...

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... VINSENSE V > 400 mV sense(max VINSENSE V > 400 mV sense(max enable CTRL voltage All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Min Typ Max 85.5 91.5 97.5 210 280 350 ±4 ±5 ±6 68 ...

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... The clamp voltage on the PROTECT pin is lowered when the power-down (latched or restart protection). TEA1733MT Preliminary data sheet Conditions DRIVER = 2 V DRIVER DRIVER All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Min Typ Max −0.3 −0.25 - 0.25 0.3 - 0.6 0. ...

Page 15

... NXP Semiconductors 11. Application information A power supply with the TEA1733MT is a flyback converter operating in Continuous conduction mode (see Capacitor C5 buffers the IC supply voltage, which is powered via resistor R3 at start-up and via the auxiliary winding during normal operation. Sense resistor R9 converts the current through the MOSFET S1 into a voltage on pin ISENSE. The value of R9 defines the maximum primary peak current on MOSFET S1 ...

Page 16

... REFERENCES JEDEC JEITA MS-012 All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control θ detail ...

Page 17

... NXP Semiconductors 13. Revision history Table 6. Revision history Document ID Release date TEA1733MT v.1 20110204 TEA1733MT Preliminary data sheet Data sheet status Change notice Preliminary data sheet - All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC Supersedes - © ...

Page 18

... Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC © NXP B.V. 2011. All rights reserved ...

Page 19

... Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. GreenChip — trademark of NXP B.V. http://www.nxp.com salesaddresses@nxp.com All information provided in this document is subject to legal disclaimers. Rev. 1 — 4 February 2011 TEA1733MT GreenChip SMPS control IC © NXP B.V. 2011. All rights reserved ...

Page 20

... Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2011. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com All rights reserved. Date of release: 4 February 2011 Document identifier: TEA1733MT ...

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