BL8305A

BL8305A

BL8305A

BALLAST CONTROL IC

BALLAST CONTROL IC

BALLAST CONTROL IC

http://www.belling.com.cn

- 1 -

8/28/2006

Total 8 Pages

The ballast control IC BL8305A is an improved version of the BL8301. The BL8305A

provides more functionality and is easier to use than previous IC BL8301. The BL8305A

optimizes the compatibility of driving MOSFET half-bridge (MHF

MHF

MHF

MHF) or Bipolar

half-bridge

(BHF

BHF

BHF

BHF).

Especially

for

Bipolar

half-bridge,

the

BL8305A

can

automatically adjust the base current intensity (BCI Auto

BCI Auto

BCI Auto

BCI Auto-

--

-Adj

Adj

Adj

Adj), and

guarantee that the half-bridge is in the optimum condition and reduces

the power loss of half-bridge. It also improves the load adaptive of

bipolar half-bridge. The BL8305A changes the timing component

connection structure according to BL8301, so it is easier to design

simply dimming products. The BL8305A has fully protections and all

pins have Latch immunity and ESD protection, available in both PDIP14

and SOP14 packages.

FEATURES

FEATURES

FEATURES

FEATURES

Driving both MHF and BHF

Automatically adjusting the BCI of BHF

Programmable preheat frequency, preheat time and run frequency

Comprehensive protection

Micro power startup less than 150uA

Latch immunity and ESD protection

B

BB

BRIEF INTRODUCTION

RIEF INTRODUCTION

RIEF INTRODUCTION

RIEF INTRODUCTION

1. The BL8305A automatically provides a dead time 3us for BHF and 1.2us

for MHF.

2. The BL8305A features include on power preheat and ignition. Preheat

frequency, preheat time and run mode frequency are all programmable by

external components.

3. Comprehensive protections such as protection from over current of

Half-bridge, filament failures, ignition failure, end of life,

detecting base current of half-bridge and so on.

4. The BL8305A have an internal power regulator at 6.35V and micro power

startup less than 150uA.

5. The BL8305A is a low cost design for ballast with few external

components.