Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsPMICsPMIC - lighting/front end device controller CFL/TL controller SOIC 16 Surface-mount

1. General description

The UBA20270 is a high-voltage power IC intended to control higher powered self

ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20270 is a

controller circuit with advanced features for dimming and has a lamp current controlled

boost feature for boosting cold (amalgam) CFLs.

The controller contains a half-bridge drive function for

CFL, a high-voltage level-shift

circuit with integrated bootstrap diode. In addition, the controller contains an oscillator

function, a current control function both for preheat and burn, a timer function and

protection circuits. The UBA20270 is supplied via a dV/dt current charge supply circuit

from the half-bridge circuit.

Remark: Main

s voltages noted are AC.

2. Features and benefits

2.1 Half-bridge features

 Integrated high-voltage level-shift function with integrated bootstrap diode

2.2 Preheat and ignition features

 Coil saturation protection during ignition

 Adjustable preheat time

 Adjustable preheat current

 Ignition lamp current detection

2.3 Lamp boost features

 Adjustable boost timing

 Fixed boost current ratio of 1.5

 Gradually boost to burn transition timing

2.4 Dim features

 Continuously variable dimming function for standard phase cut dimmers

 Natural dimming curve by logarithmic correction

 Adjustable Minimum Dimming Level (MDL)

 Controlled lamp ON/OFF

UBA20270

600 V Driver IC for dimmable compact fluorescent lamps

Rev. 2 — 8 September 2011 Product data sheet

Summary of content (32 pages)

PAGE 1
UBA20270 600 V Driver IC for dimmable compact fluorescent lamps Rev. 2 — 8 September 2011 Product data sheet 1. General description The UBA20270 is a high-voltage power IC intended to control higher powered self ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20270 is a controller circuit with advanced features for dimming and has a lamp current controlled boost feature for boosting cold (amalgam) CFLs.
PAGE 2
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 2.5 Protection      OverCurrent Protection (OCP) in boost and burn state Capacitive Mode Protection (CMP) OverPower Protection (OPP) Power-down function OverTemperature Protection (OTP) 2.6 Other features  Current controlled operating in boost and burn state  External power-down function  Lamp flicker suppression 3.
PAGE 3
xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x SUPPLY DIVIDE BY 2 LOGIC REFERENCE VOLTAGES 14 FS DRIVER LOGIC 15 HBO LS driver TEMPERATURE SENSO
PAGE 4
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 6. Pinning information 6.1 Pinning SLS 1 16 GHS GLS 2 15 HBO PGND 3 14 FS VDD 4 13 SGND UBA20270 RREF 5 12 CB CF 6 11 CP MDL 7 10 DCI CI 8 9 CSI 001aam664 Fig 2. Pin configuration (SO16) 6.2 Pin description Table 2.
PAGE 5
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 7. Functional description The UBA20270 is an IC for driving external half-bridge MOSFETs in self ballasted high-power CFL and their derivatives. The UBA20270 is equipped with a dimming control input that has a logarithmic corrected natural dimming function. This function enables a less sensitive brightness control of the lamp at low dim levels.
PAGE 6
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 7.1 Lamp start-up cycle 7.1.1 Reset state The UBA20270 is in a reset state while the supply voltage on the VDD pin is below the VDD(rst) level. In the reset state, a part of the internal supply is turned off, all registers, counters and timers are undefined. In addition, the hold state latch is reset and both the applied external high and low-side transistor (Q1, Q2) are non-conductive.
PAGE 7
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps The preheat time consists of eight saw-toothed pulses at the CP pin. Preheat begins as soon as the capacitor on the CP pin is charged to a voltage higher than Vth(CP)max. During the preheat time, the current feedback sensor circuit (input CSI pin) is disabled. To increase noise immunity, an internal filter of 30 ns is included at the SLS pin.
PAGE 8
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps voltage (V) 5V 2nd failed ignition attempt 1st failed ignition attempt VCP Vth(CP)max Vth(CP)min discharge to 0 V Vth(rel)CP startup time 1st preheat time tph HOLD STATE 2nd preheat time ten(ign) td(restart) tph 1st ignition enabling time restart delay time 2nd startup POWER DOWN STATE ten(ign) 2nd ignition enabling time 0V time (s) 001aan537 Fig 5. Retry cycle 7.1.
PAGE 9
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps voltage (V) 5V VCP Vth(CP)max 4.5 V 1 32 Vth(CP)min 3.8 V Vth(CB)max 3.6 V VCB Vth(CB)min 1.1 V 1 2 61 62 63 0.6 V ignition boost 0V transition burn time (s) 001aam765 Fig 6. Boost timing In the boost state, the lamp current feedback control circuit operates the same as in the burn state. This action is used to improve lamp stability. Lamp current boosted by a fixed ratio of 1.
PAGE 10
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps internal current output of the OTA is transferred via an integrator on the CI pin to the input of the Voltage Controlled Oscillator (VCO). The VCO regulates the frequency and as a result, the lamp current. BOOST AND BURN STATES Vi(DCI) > Vth(bst)DCI AND boost boost timer running (2) 00 burn select 01 boost Boost_ratio = 1 Boost_ratio = 1.
PAGE 11
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps When CP is lower than Vth(rel)CP, the IC is released from the hold state and moves to the start-up state. See Figure 3. Alternatively, the hold state ends when the supply voltage is lower than VDD(rst) and the IC is reset. With a 470 nF capacitor on the CP pin, the typical hold state retention delay is between 1.0 seconds and 1.7 seconds.
PAGE 12
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps voltage (V) VCF 0 tdch V(GHS-HBO) 0 VGLS tno tno 0 VHBO 0 time (s) 001aam766 Fig 8. Sawtooth, gate driver and half-bridge output signals 7.2.2 Combined timing circuit A combined timing circuit is included to determine the preheat time, ignition enabling time and overcurrent time, see Figure 9. The circuit consists of a clock generator defined by CCP and Rext(RREF) and a counter.
PAGE 13
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps voltage (V) ignition enabling time 5V VCP Vth(CP)max 4.5 V Vth(CP)min 3.8 V CFL ignition overcurrent ignition time startup time preheat time 0V fault time boost-burn power down time (s) 001aam768 Fig 9. Timing diagram preheat, ignition and overcurrent 7.
PAGE 14
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps voltage (V) 1.2 Vi(CSI) [VRMS] internal clamp (1) Vclamp(CSI) 1.0 100 % 0.8 0.6 VLD 0.4 midcurve 0.2 Vth(hys)DCI MDL 0 0 0.4 0.2 VT(hec1)DCI 0.6 0.8 VT(hec2)DCI 1.0 0.9 Vth(start)DCI 1.2 1.4 1.6 Vi(DCI) (V) voltage (V) VT(hec3)DCI 001aam671 (1) Vi(CSI) = VLD = f(Vi(DCI)) Fig 10. CSI voltage as a function of DCI voltage 7.4 Protection and power-down 7.4.
PAGE 15
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Coil saturation protection is triggered when the voltage on the SLS pin exceeds Vth(sat)SLS. The voltage VSLS on the SLS pin is also used to set the preheat current. The value of external resistor RSLS determines this voltage. 7.4.2 OverCurrent Protection (OCP) OCP is active in the burn and boost states (not during boost transition).
PAGE 16
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 7.4.5 Power-down mode Power-down mode is entered when: • a continuous overcurrent exceeds the maximum overcurrent time-out tfault(oc). Or over a longer period if the overcurrent occurs in more than half the number of cycles as soon as Vth(CP)min is reached.
PAGE 17
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 8. Limiting values Table 3. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit Rext(RREF) external resistance on pin RREF fixed nominal value 33 k 30 36 k SR slew rate on pins HBO with respect to GND 4 +4 V/ns P = 0.
PAGE 18
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 10. Characteristics Table 5. Characteristics VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit high-side switch = off; low side switch = on 5.7 6.2 6.
PAGE 19
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Table 5. Characteristics …continued VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Io(CF)min Io(CF)max Conditions Min Typ Max Unit minimum output current VCF = 1.5 V; VCB = 0 V ; on pin CF VCI = Vclamp(CI) 22.8 21.8 20.
PAGE 20
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Table 5. Characteristics …continued VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit forward voltage bootstrap diode; IFS = 5 mA; (VF = VDD - VFS) 1.3 1.7 2.1 V Vi(SLS) = 0.4 V - - 1 A 0.57 0.60 0.
PAGE 21
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Table 5. Characteristics …continued VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Vth(CB)max Conditions Min Typ Max Unit maximum threshold voltage on pin CB - 3.6 - V Vhys(CB) hysteresis voltage on pin CB 2.3 2.5 2.
PAGE 22
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Table 5. Characteristics …continued VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified.
PAGE 23
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Table 5. Characteristics …continued VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter VT(hec2)DCI Conditions Min Typ Max Unit human eye correction 2 Rext(RREF) = 33 k; transition voltage on pin RMDL = 2.0 k; DCI Vi(CSI) = Vclamp(CSI) - 0.
PAGE 24
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 11. Application information 11.1 Design equations All equations are only valid for Rext(RREF) = 33 k 11.1.
PAGE 25
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 0.5 f bridge  min  = ---------------------------------------------------------------------------C CF + C par ---------------------------  V th  CF max + t dch I o  CF min (8) • Minimum bridge frequency with enabled boost: 0.
PAGE 26
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Table 6. UBA20270 Product data sheet Typical components for a 230 V mains application …continued Reference Component UBA20270 R5, R6 330 k R7, R10 100 k R8 1 k R9 1 k R11 39 k RREF 33 k; 1 % RSLS 1.2  RMDL 1 k RCSI 8.2  C1, C2 22 nF; 630 V C3 3.3 nF; 1000 V Description adjust for nominal lamp current C4 10 F; 400 V C5 4.
PAGE 27
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 12. Package outline SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 D E A X c y HE v M A Z 16 9 Q A2 A (A 3) A1 pin 1 index θ Lp 1 L 8 e 0 detail X w M bp 2.5 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.
PAGE 28
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 13. Abbreviations Table 7.
PAGE 29
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 14. Revision history Table 8. Revision history Document ID Release date Data sheet status Change notice Supersedes UBA20270 v.2 20110908 Prroduct data sheet - UBA20270 v.1 UBA20270 v.1 20110816 Preliminary data sheet - - UBA20270 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 8 September 2011 © NXP B.V. 2011. All rights reserved.
PAGE 30
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 15. Legal information 15.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
PAGE 31
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps Non-automotive qualified products — Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements.
PAGE 32
UBA20270 NXP Semiconductors 600 V Driver IC for dimmable compact fluorescent lamps 17. Contents 1 2 2.1 2.2 2.3 2.4 2.5 2.6 3 4 5 6 6.1 6.2 7 7.1 7.1.1 7.1.2 7.1.3 7.1.4 7.1.5 7.1.6 7.1.7 7.2 7.2.1 7.2.2 7.3 7.4 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 8 9 10 11 11.1 11.1.1 11.1.2 11.1.3 11.1.4 11.1.5 12 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Half-bridge features . . . . . . . . . . . . . . . . . . . . .