Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

IR2159 Datasheet(PDF) 18 Page - International Rectifier

Part No. IR2159
Description  DIMMING BALLAST CONTROL IC
Download  25 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
Logo 

IR2159 Datasheet(HTML) 18 Page - International Rectifier

Zoom Inzoom in Zoom Outzoom out
 18 / 25 page
background image
IR2159/IR21591 (S)
18
www.irf.com
60uA
-1uA
t
t
t
t
V
CVCO
I
CVCO
V
RCS
VS
LO
HO
V
IPH
Figure 8, Peak load current regulation timing diagram.
This feedback keeps the peak preheat current
regulated to the user-programmable setting on pin
IPH for the duration of the preheat time. An
internal current source connected to an external
resistor on pin IPH sets a voltage reference for
the peak pre-heat current. The pre-heat time
continues until the voltage on pin CPH exceeds
5V.
Ignition (IGN)
The IR2159 enters ignition mode when the voltage
on pin CPH exceeds 5V. The peak current
regulation reference voltage is disconnected from
the user-programmable setting on pin IPH and is
connected to a higher internal threshold of 1.6V
(Figure 9).
3
7.6V
2
1uA
4
CPH
DIM
VCO
11
12
COM
LO
10
CS
1uA
1.6V
Q2
RCS
VCO
PH
LOGIC
16
HO
Q2
15
VS
R
DIM
C
CPH
C
VCO
Half
Bridge
Output
I
LOAD
V
BUS(+)
V
BUS(-)
Load
Return
Half
Bridge
Driver
IR2159
DIM
INTERFACE
0.5 to 5V
PHASE
CONTROL
FAULT
LOGIC
Figure 9, IR2159 ignition circuitry.
The ignition ramp is then initiated as the capacitor
on pin VCO discharges linearly through an internal
1uA current source. The frequency decreases
linearly towards the resonance frequency of the
high-Q ballast output stage, causing the lamp
voltage and load current to increase (Figure 10).
The frequency continues to decrease until the lamp
ignites or the current limit of the IR2159 is reached.
If the current limit is reached, the IR2159 enters
FAULT mode. The 1.6V threshold together with
the external current sensing resistor on pin CS
determine the maximum allowable peak ignition
current (and therefore peak ignition voltage) of the
ballast output stage. The peak ignition current
must not exceed the maximum allowable current
ratings of the output stage MOSFETs or IGBTs,
and, the resonant inductor must not saturate
at any time.
Should the lamp ignite, the frequency continues
to decrease until the voltage on pin VCO reaches
VDIMTH, corresponding to the minimum operating
frequency set by the external resistor on pin FMIN,


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
KA7531BALLAST CONTROL IC 1 2 3 4 5 MoreSamsung semiconductor
B59701Measurement and Control SMDs 1 2 List of Unclassifed Manufacturers
AP1511PWM Control 5A Step-Down Converter 1 2 3 4 5 Anachip Corp
IXP42XIntel® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor 1 2 3 4 5 MoreIntel Corporation
TLP434ARF ASK Hybrid Modules for Radio Control 1 List of Unclassifed Manufacturers
UBA2070600 V CCFL ballast driver IC 1 2 3 4 5 MoreNXP Semiconductors
BGY284Power amplifier with integrated control loop for GSM850 EGSM900 DCS1800 & PCS1900 1 2 3 4 5 MoreNXP Semiconductors
AN7381Tone Control Circuit 1 2 3 4 Panasonic Semiconductor
IR3084XPHASETM VR 10/11 CONTROL IC 1 2 3 4 5 MoreInternational Rectifier
MAX168192MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming 1 2 3 4 5 MoreMaxim Integrated Products

Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn