UBA20270T/N1 datasheet, PDF - EEWORLD Datasheet

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UBA20270T/N1: DescriptionIC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 3.90 MM, PLASTIC, MS-012, SOT109-1, SOP-16, Power Management Circuit; CategoryPower/power management The power supply circuit; File Size805KB，32 Pages; ManufacturerNXP; Websitehttps://www.nxp.com

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UBA20270T/N1 Overview

IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 3.90 MM, PLASTIC, MS-012, SOT109-1, SOP-16, Power Management Circuit

UBA20270T/N1 Parametric

Parameter Name	Attribute value
Maker	NXP
Parts packaging code	SOIC
package instruction	SOP,
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G16
length	9.9 mm
Number of channels	1
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Maximum seat height	1.75 mm
Nominal supply voltage (Vsup)	13 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
width	3.9 mm

UBA20270T/N1 Preview

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.

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:

Mains 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

NXP Semiconductors

UBA20270

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. Applications



Dimmable compact fluorescent lamps for power levels above 20 W and for universal

mains voltages.

4. Ordering information

Table 1.

Ordering information

Package

Name

UBA20270T/N1

SO16

Description

Plastic small outline package; 16 leads; body width 3.9 mm

Version

SOT109-1

Type number

UBA20270

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 8 September 2011

2 of 32

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Product data sheet

Rev. 2 — 8 September 2011

3 of 32

UBA20270

All information provided in this document is subject to legal disclaimers.

5. Block diagram

NXP Semiconductors

BOOTSTRAP

14 FS

driver

16 GHS

15 HBO

SUPPLY

REFERENCE

VOLTAGES

TEMPERATURE

SENSOR

160° 120° 80°

DIVIDE BY 2

LOGIC

DRIVER

LOGIC

LEVEL

SHIFTER

driver

2 GLS

1 SLS

5 V DIGITAL

5 V ANALOG

STATE LOGIC

VS LOW

RESET

CP 11

RESET STATE

START-UP STATE

PREHEAT STATE

IGNITION STATE

HOLD STATE

BOOST STATE

BURN STATE

POWER-DOWN STATE

CAPACITIVE MODE DETECTOR

Vth(capm)SLS

PREHEAT CURRENT SENSOR

LOGIC

CB 12

COUNTER

PREHEAT/

BOOST TIMER

Vph(SLS)

LOGIC

INDUCTOR SATURATION/

OVERCURRENT DETECTOR

Vth(ocp)SLS

25 μA

600 V Driver IC for dimmable compact fluorescent lamps

1 μA

6 μA

60 μA

LOGIC

IGNITION CURRENT DETECTOR

Vth(det)ign(CSI)

SGND 13

3 PGND

REFERENCE

CURRENT

1.27 V

VOLTAGE

CONTROLLED OSCILLATOR

LOGIC

FREQUENCY

CONTROL

BOOST

AMPLIFIER

VLD

BOOST ENABLE

Vclamp

(CSI)

Vth(bst)

(DCI)

START ENABLE

OTA

VCO

Vth(start)

(DCI)

VT(hec1)

DCI

10 DCI

UBA20270

LAMP

CURRENT

SENSOR

Votp(CSI)

DCI

25 μA

DSR

LEVEL SHIFT

DIMMER

CONTROL

RREF

CSI

MDL

001aam663

Fig 1.

Block diagram

NXP Semiconductors

UBA20270

600 V Driver IC for dimmable compact fluorescent lamps

6. Pinning information

6.1 Pinning

SLS

GLS

PGND

RREF

MDL

16 GHS

15 HBO

14 FS

13 SGND

UBA20270

001aam664

12 CB

11 CP

10 DCI

CSI

Fig 2.

Pin configuration (SO16)

6.2 Pin description

Table 2.

Symbol

SLS

GLS

PGND

RREF

MDL

CSI

DCI

SGND

HBO

GHS

Pin description

Description

source low-side switch input

low-side gate driver output

power ground

low voltage supply

internal reference current input

voltage controlled oscillator capacitor

minimum dimming level input

voltage controlled oscillator input integrating capacitor

current feedback sense input

dimming level input

preheat timing capacitor

boost timing capacitor

signal ground

floating supply voltage

half-bridge output

high-side gate driver output

UBA20270

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 8 September 2011

4 of 32

NXP Semiconductors

UBA20270

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.

The UBA20270 is rated up to a maximum continuous rectified mains voltage of 500 V

(peak 600 V). The UBA20270 includes all the necessary functions for preheat, ignition,

boost, and on-state operation of the lamp. In addition, the UBA20270 includes several

protection measures that safeguard the functioning of the CFL and controller. The

controller states are shown in

Figure 3.

= 0

RESET STATE

HOLD = 0

> V

DD(rst)

< V

DD(rst)

< V

DD(rst)

START-UP STATE

< V

th(rel)CP

POWER-DOWN STATE

(1)

PREHEAT STATE

(2)

HOLD STATE

(3)

HOLD = 1

preheat time

completed

IGNITION STATE

(4)

Ignition_Detected

(6)

BOOST AND BURN

STATES

(5)

001aam665

(1) V

> V

DD(start)

AND V

i(DCI)

> V

th(start)DCI

AND (HOLD = 0 OR V

< V

th(rel)CP

)

(2) V

< V

DD(stop)

OR V

i(DCI)

< V

th(start)DCI



th(hys)DCI

(3) (End of ignition time AND HOLD = 0) OR V

< V

DD(stop)

OR V

i(DCI)

< V

th(start)DCI



th(hys)DCI

(4) End of ignition time AND HOLD = 1

(5) V

< V

th(pd)CP

OR overcurrent fault time >

⁄

OR f

bridge(max)

detected in capacitive mode

(6) V

< V

DD(stop)

OR V

i(DCI)

< V

th(start)DCI



th(hys)DCI

Fig 3.

State diagram

UBA20270

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 8 September 2011

5 of 32

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