tea1612t NXP Semiconductors, tea1612t Datasheet

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tea1612t

Manufacturer Part Number
tea1612t
Description
Zero Voltage Switching Resonant Converter Controller
Manufacturer
NXP Semiconductors
Datasheet
1. General description
2. Features
The TEA1612T is a monolithic integrated circuit implemented in a high-voltage double
Diffused Metal Oxide Semiconductor (DMOS) process. The circuit is a high voltage
controller for a zero-voltage switching resonant converter. The IC provides the drive
function for two discrete power MOSFETs in a half-bridge configuration. It also includes a
level-shift circuit, an oscillator with an accurately-programmable frequency range, a
latched shut-down function, burst mode operation and a transconductance error amplifier.
The oscillator signal passes through a divide-by-two flip-flop before being fed to the output
drivers in order to guarantee an accurate 50 % switching duty factor.
The circuit is very flexible and enables a broad range of applications for different mains
voltages.
I
I
I
I
I
I
I
Fig 1.
TEA1612T
Zero voltage switching resonant converter controller
Rev. 01 — 24 September 2009
Adjustable burst mode operation at low loads for low standby power
Integrated high voltage level-shift function
Integrated high voltage bootstrap diode
Low start-up current
Adjustable non-overlap time
Internal Over Temperature Protection (OTP)
Over Current Protection (OCP) that activates a shut-down timer
Basic configuration
ground
signal
TEA1612T
V DD
power ground
V
drv(hs)
bridge voltage
supply
(high side)
MOSFET
SWITCH
CIRCUIT
BRIDGE
HALF-
CONVERTER
RESONANT
014aaa825
Product data sheet

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tea1612t Summary of contents

Page 1

... Zero voltage switching resonant converter controller Rev. 01 — 24 September 2009 1. General description The TEA1612T is a monolithic integrated circuit implemented in a high-voltage double Diffused Metal Oxide Semiconductor (DMOS) process. The circuit is a high voltage controller for a zero-voltage switching resonant converter. The IC provides the drive function for two discrete power MOSFETs in a half-bridge confi ...

Page 2

... Table 1. Ordering information Type number Package Name TEA1612T SO24 TEA1612T_1 Product data sheet Zero voltage switching resonant converter controller Description plastic small outline package; 24 leads; body width 7.5 mm Rev. 01 — 24 September 2009 TEA1612T Version SOT137-1 © NXP B.V. 2009. All rights reserved ...

Page 3

... Product data sheet Zero voltage switching resonant converter controller 10k 12.6 V LEVEL SHIFTER SUPPLY 5 V LOGIC 1 600 VCO IRS VREF Rev. 01 — 24 September 2009 TEA1612T 12 VDD(FLOAT HIGH SIDE 10 DRIVER LOW SIDE 8 DRIVER PGND 7 OCP 0 ...

Page 4

... Rev. 01 — 24 September 2009 TEA1612T 24 BURST 23 HYST 22 VREF IRS 19 CF TEA1612T 18 IFS 17 RESET 16 VAUX SGND 014aaa824 [1] © NXP B.V. 2009. All rights reserved ...

Page 5

... V DD reaches the start level GH- Start-up Rev. 01 — 24 September 2009 TEA1612T (see Figure 4), the low side power DD(init zero and defines the f reaches the start level (13.5 V), the oscillator is V DD(startup) V DD(init) t 014aaa036 © NXP B.V. 2009. All rights reserved. ...

Page 6

... IFS no resistor is connected between the VREF pin (3 V reference voltage) and the is twice the current flowing into the IRS pin. f Rev. 01 — 24 September 2009 TEA1612T and the currents f and f (see Figure f Figure 5. non-overlap time (low to high) t 014aaa685 and determines the falling slope of the ...

Page 7

... IRS2 max 1 = ------------ - T OSC f osc max = --------------------- - IRS min IFS Rev. 01 — 24 September 2009 TEA1612T ) and the discharge current: IRS1 resistor which is connected between f increases and the oscillation frequency CF Figure 6 f(min) and determine the f © NXP B.V. 2009. All rights reserved ...

Page 8

... CF f osc f osc(max) f osc(start) f osc(min) 0 Frequency range and the minimum frequency setting is independent of the characteristics of f(min) Rev. 01 — 24 September 2009 TEA1612T , the peak-to-peak f I IRS 014aaa038 is fed to the IRS input of the VCO . VCO(start) © NXP B.V. 2009. All rights reserved ...

Page 9

... During shut-down mode, V input current. This clamp prevents V current to the TEA1612T in shut-down mode. When the TEA1612T is in shut-down mode, it can only be activated again by lowering V to below the V shut-down latch is then reset and a new start-up cycle can commence. In shut-down mode the GL pin is high and the GH pin is low. In this way the bootstrap capacitor remains charged so that after a reset a new cycle can start well defi ...

Page 10

... In case the CT voltage exceeds V The timer capacitor will be discharged with I after which a soft start cycle is started. 7.13 Overtemperature protection The TEA1612T continuously monitors its temperature. When the temperature exceeds the T otp(act) 7.14 Brownout protection The brownout protection compares the actual BO pin with the V ...

Page 11

... IFS current on pin IRS current on pin VREF total power dissipation ambient temperature storage temperature electrostatic discharge voltage 7, and in the application note). Thermal characteristics Parameter thermal resistance from junction to ambient Rev. 01 — 24 September 2009 TEA1612T Conditions Min Max 0 600 [ [ ...

Page 12

... V IRS 200 A IRS 16 IFS 16 IFS IFS C = 100 pF 0.5 mA 16; f IFS IRS bridge OSC Rev. 01 — 24 September 2009 TEA1612T = Min Typ Max Unit - - 12.9 13.4 13.9 V 9.0 9.4 9.8 V 3.8 4 11.0 12.0 13 ...

Page 13

... I(cm I(cm) VCO source only I(cm GND I(cm GND I(cm) operating GND L operating VCO I = 0.3 mA VCO Rev. 01 — 24 September 2009 TEA1612T DD Min Typ Max [2] 395 440 485 - 1. 2.97 - 1.6 1.7 1.8 0.58 0.63 0.68 14.4 16 17.6 - 300 - - 480 - - 300 ...

Page 14

... The supply current I increases with the increasing bridge frequency to drive the capacitive load of two MOSFETs. Typical MOSFETs DD for the TEA1612T application are 8N50 (NXP type PHX80N50E, Q 150 kHz according to the following formula: [2] The frequency of the oscillator depends on the value of capacitor C currents I and I ...

Page 15

... LOW SIDE DRIVER 1. LOGIC 2. 1 OSCILLATOR 600 mV 600 VCO IRS VREF IFS R f(min fb2 R fb1 Rev. 01 — 24 September 2009 TEA1612T 12 VDD(FLOAT) C VDD n. PGND 8 7 OCP 0 OVP 6 CT TIMER ...

Page 16

... 0.49 0.32 15.6 7.6 10.65 1.27 0.36 0.23 15.2 7.4 10.00 0.019 0.013 0.61 0.30 0.419 0.05 0.014 0.009 0.60 0.29 0.394 REFERENCES JEDEC JEITA MS-013 Rev. 01 — 24 September 2009 TEA1612T detail 1.1 1.1 0.25 0.25 0.1 1.4 0.4 1.0 0.043 0.043 0.01 0.01 0.004 0.055 0.016 0.039 ...

Page 17

... Revision history Table 6. Revision history Document ID Release date TEA1612T_1 20090924 TEA1612T_1 Product data sheet Zero voltage switching resonant converter controller Data sheet status Change notice Product data sheet - Rev. 01 — 24 September 2009 TEA1612T Supersedes - © NXP B.V. 2009. All rights reserved ...

Page 18

... Limiting values and Characteristics sections of this document, and as such is not complete, exhaustive or legally binding. 14.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. http://www.nxp.com salesaddresses@nxp.com Rev. 01 — 24 September 2009 TEA1612T © NXP B.V. 2009. All rights reserved ...

Page 19

... 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. 2009. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com TEA1612T All rights reserved. Date of release: 24 September 2009 Document identifier: TEA1612T_1 ...

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