uba20261 NXP Semiconductors, uba20261 Datasheet

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uba20261

Manufacturer Part Number
uba20261
Description
600 V And 350 V Power Ic For Step Dimmable Cfls
Manufacturer
NXP Semiconductors
Datasheet
1. General description
2. Features and benefits
2.1 Half-bridge features
2.2 Preheat and ignition features
2.3 Lamp boost features
The UBA20261/2 are high-voltage power integrated circuits designed to drive and control
high powered self-ballasted Compact Fluorescent Lamp (CFL) lighting applications
operating at mains supply voltages of 120 V or 230 V. The IC includes a half-bridge power
circuit consisting of two NMOST power MOSFETs, an advanced feature for step dimming
and a lamp current controlled boost feature for boosting cold (amalgam) CFLs.
The controller contains a CFL half-bridge drive function, a high-voltage level-shift circuit
with integrated bootstrap diode, an oscillator function, a current control function for
preheat and burn, a timer function and protection circuits. The UBA20261/2 are supplied
using the dV/dt current charge supply circuit from the half-bridge circuit.
Remark: The mains voltages given in this data sheet are AC voltages.
UBA20261/2
600 V and 350 V power IC for step dimmable CFLs
Rev. 1 — 9 September 2011
UBA20261: two internal 350 V, 1 , maximum 5 A NMOST half-bridge power
MOSFETs
UBA20262: two internal 600 V, 3 , maximum 2.7 A NMOST half-bridge power
MOSFETs
Integrated high-voltage level-shifter function with integrated bootstrap diode
Coil saturation protection during ignition
Adjustable saturation protection level
Adjustable preheat time
Adjustable preheat current
Ignition lamp current detection
Adjustable boost timing
Fixed boost current ratio of 1.5
Gradually boost to burn transition timing
Preliminary data sheet

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uba20261 Summary of contents

Page 1

... Remark: The mains voltages given in this data sheet are AC voltages. 2. Features and benefits 2.1 Half-bridge features UBA20261: two internal 350 V, 1 , maximum 5 A NMOST half-bridge power  MOSFETs UBA20262: two internal 600 V, 3 , maximum 2.7 A NMOST half-bridge power  ...

Page 2

... Current controlled operation in both boost and burn state  External power-down option 3. Applications  UBA20261: Step-dimmable compact fluorescent lamps at power levels between 5 W and 20 W operating at 120 V mains voltage  UBA20262: Step-dimmable compact fluorescent lamps at power levels between 5 W and 20 W operating at 230 V mains voltage 4 ...

Page 3

SUPPLY REFERENCE VOLTAGES 5 V DIGITAL MEMORY 5 V DIGITAL 5 V ANALOG V DD(stop RESET CP 13 PREHEAT BOOST TIMER CB 14 STEP DIMMER + LOGIC - + - 1 μA 6 ...

Page 4

... LSAT PGND RREF MDL 10 CI Pin configuration for UBA20261/2 (SOT109-1) Pin description Pin Description source low-side switch 4 coil saturation level input [2] 5 power ground 6 low voltage supply 7 internal reference current input 8 voltage controlled oscillator capacitor ...

Page 5

... Only minor adjustment of the presets is possible. The UBA20261/2 are rated maximum continuous rectified mains voltage of 350 V or 500 V, respectively and lamp power- The UBA20261/2 includes all functions necessary for preheat, ignition and boost operation of the lamp. In addition, the IC includes the four-step dimming feature and several protective features to safeguard CFL operation ...

Page 6

... NXP Semiconductors 7.1 Lamp start-up cycle 7.1.1 Reset state The UBA20261/2 are in the reset state when the supply voltage on the V the V DD(rst) counters and timers are undefined. The hold state latch is reset and both the high and low side power transistors are non-conductive. ...

Page 7

... To avoid repeated ignition attempts and overheating of the bridge(min) 1 ⁄ of the preheat time second ignition attempt also exceeds the ignition 4 ph All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 CP > V (see Figure 5). DD(start boost ...

Page 8

... Figure 7 shows the boost and burn state in more detail. In the boost state, the is discharged below the V CB All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261 failed ignition attempt nd 2 preheat ...

Page 9

... R CB ext(RREF), [A]). bridge(min) . bridge(bst)min Figure 4[A]). The voltage across sense resistor R All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261 boost a boost time of more than 300 s is possible. In ( 80 C), a temperature protection j(bp)bst ( 120 C). If the temperature ...

Page 10

... IC is reset. DD(rst) pin alternates between V DD (see Figure th(rel)CP All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 Dim_1 state AND Boost 01 Boost_ratio = 1 boost NOT (Boost OR Boost transition) Temp > T j(end)bst OR boost timer ended ...

Page 11

... V HBO 0 Saw-tooth, gate driver and half-bridge output signals Figure 9 All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 and V . Typically, the supply current DD(stop) DD(start) and V . More current is drawn during the DD(stop resistor R and the voltage on the CI pin ...

Page 12

... Timing diagram for preheat, ignition and overcurrent 7.3 Step dimming The UBA20261/2 uses the step dimming method of dimming a lamp load. This method enables the lamp to operate in four different light output level modes including full power. The four different dim level modes can be selected by toggling the supply voltage which is made possible by toggling the mains voltage switch ...

Page 13

... k MDL All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 lamp off lamp on new dim level retention start-up is equal to one of i(CSI) (1) of the initial light output © ...

Page 14

... i(CSI) MDL 0 ( off-on toggle DD th(sat)SLS is injected into the C o(sat)CF CF All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 DIM_1 100 % off-on toggle V off-on toggle DD DIM_2 (1) DIM_3 (1) MDL 001aam770 . The internal reference current is derived MDL ...

Page 15

... IC enters Power-down mode. The V level during the ignition state. also provides information about the half-bridge switching behavior. SLS level. th(capm)SLS All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 discharges enabling CI th(sat)SLS LSAT is possible. When resistor R th(sat)SLS even when R is not mounted ...

Page 16

... OTP changes the lamp current to the level equal to the V j(otp) bridge(max The IC then enters Power-down mode. All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 threshold when the LS th(capm)SLS is enabled. o(CI) th(CP)min is reached due to capacitive mode detection supply is internally clamped. The circuit is CP ...

Page 17

... UBA20261 C operating at T amb = 25 C operating at T amb UBA20262: operating during 1 s with respect to HBO LPF used as input pin All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 Min 30 4 40 40  ...

Page 18

... Conditions in free air; SO20 package on JEDEC 2S 2P board All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 Min Max Unit 2000 +2000 V 1000 +1000 V  ...

Page 19

... NXP Semiconductors 10. Characteristics Table 5. Characteristics  HBO referenced to PGND and SGND, positive currents flow into the UBA20261/2, unless otherwise specified. Symbol Parameter Start-up state Pin reset supply voltage DD(rst) V stop supply voltage DD(stop) V start supply voltage ...

Page 20

... NXP Semiconductors Table 5. Characteristics …continued  HBO referenced to PGND and SGND, positive currents flow into the UBA20261/2, unless otherwise specified. Symbol Parameter Power transistors R on-state resistance on-state resistance ratio on(150) on(25) (150  C) Boot strap diode ...

Page 21

... NXP Semiconductors Table 5. Characteristics …continued  HBO referenced to PGND and SGND, positive currents flow into the UBA20261/2, unless otherwise specified. Symbol Parameter Boost timer Pin CB t boost time bst I output current on pin CB o(CB) V minimum threshold voltage on pin ...

Page 22

... Table 5. Characteristics …continued  HBO referenced to PGND and SGND, positive currents flow into the UBA20261/2, unless otherwise specified. Symbol Parameter Capacitive mode detection Input pin SLS V capacitive mode threshold voltage th(capm)SLS on pin SLS Output pin CI I sink output current on pin CI ...

Page 23

...    hys   All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261 k. ext(RREF)  max  –  max th CP   CP  – ...

Page 24

... MDL source MDL related saturation and overcurrent threshold level   SLS th ocp LSAT source LSAT All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261 dch + t max dch + t max dch   (8) (9) (10) (11) ...

Page 25

... NXP Semiconductors 11.2 Application Diagram D5 C17 Fig 12. UBA20261/2 default application diagram Detailed in UBA20261_UBA20262 Preliminary data sheet 600 V and 350 V power IC for step dimmable CFLs C11 CFL C9 D8 C10 CSI Table list of typical application components. See All information provided in this document is subject to legal disclaimers. Rev. 1 — ...

Page 26

... BZX84JC12 BAS20 4.7 mH Würth Elektronik: 7608000902 All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 Description 2 W fusible resistor adjust for preheat current adjust for minimum lamp current adjust for nominal lamp current lamp capacitor charge pump capacitor ...

Page 27

... 0.49 0.32 13.0 7.6 10.65 1.27 0.36 0.23 12.6 7.4 10.00 0.019 0.013 0.51 0.30 0.419 0.05 0.014 0.009 0.49 0.29 0.394 REFERENCES JEDEC JEITA MS-013 All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261 θ detail 1.1 1.1 1.4 0.25 0.25 0.4 1.0 0.043 0.043 ...

Page 28

... Minimum Dimming Level OverCurrent Protection OverPower Protection Operational Transconductance Amplifier OverTemperature Protection Root Mean Square Slew Rate UnderVoltage LockOut Voltage Controlled Oscillator All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 © NXP B.V. 2011. All rights reserved ...

Page 29

... NXP Semiconductors 14. Revision history Table 8. Revision history Document ID Release date UBA20261_UBA20262 v. 1 20110909 UBA20261_UBA20262 Preliminary data sheet 600 V and 350 V power IC for step dimmable CFLs Data sheet status Preliminary data sheet All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 ...

Page 30

... 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 — 9 September 2011 UBA20261/2 © NXP B.V. 2011. All rights reserved ...

Page 31

... NXP Semiconductors’ product specifications. 15.4 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 All information provided in this document is subject to legal disclaimers. Rev. 1 — 9 September 2011 UBA20261/2 © NXP B.V. 2011. All rights reserved ...

Page 32

... 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 Document identifier: UBA20261_UBA20262 All rights reserved. Date of release: 9 September 2011 ...

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