UBA2021_4

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 04 — 25 July 2008

3 of 16

NXP Semiconductors

UBA2021

630 V driver IC for CFL and TL lamps

6.

Pinning information

6.1 Pinning

6.2 Pin description

7.

Functional description

7.1 Introduction

The UBA2021 is an integrated circuit for electronically ballasted compact fluorescent

lamps and their derivatives operating with mains voltages up to 240 V (RMS). It provides

all the necessary functions for preheat, ignition and on-state operation of the lamp. In

addition to the control function, the IC provides level shift and drive functions for the two

discrete power MOSFETs, T1 and T2 (see Figure 7).

Fig 2.

Pin configuration (SO14)

Fig 3.

Pin configuration (DIP14)

UBA2021T

FS

CI

G1

RHV

S1

CF

n.c.

SGND

VS

RREF

G2

RS

PGND

CP

001aai566

1

2

3

4

5

6

7

8

10

9

12

11

14

13

UBA2021P

FS

CI

G1

RHV

S1

CF

n.c.

SGND

VS

RREF

G2

RS

PGND

CP

001aai567

1

2

3

4

5

6

7

8

10

9

12

11

14

13

Table 3.

Pin description

Symbol

Pin

Description

FS

1

high side floating supply voltage

G1

2

gate high transistor (T1)

S1

3

source high transistor (T1)

n.c.

4

high-voltage spacer, not to be connected

VS

5

low voltage supply

G2

6

gate low transistor (T2)

PGND

7

power ground

CP

8

timing/averaging capacitor

RS

9

current monitoring input

RREF

10

reference resistor

SGND

11

signal ground

CF

12

oscillator capacitor

RHV

13

start-up resistor/feed-forward resistor

CI

14

integrating capacitor