IR21571S International Rectifier, IR21571S Datasheet

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IR21571S

Manufacturer Part Number
IR21571S
Description
IC BALLAST CONTROL 16-SOIC
Manufacturer
International Rectifier
Type
Ballast Controllerr
Datasheet

Specifications of IR21571S

Frequency
45.5 ~ 50.5 kHz
Current - Supply
5.5mA
Current - Output
500mA
Voltage - Supply
11.4 V ~ 15.6 V
Operating Temperature
-40°C ~ 125°C
Package / Case
16-SOIC (3.9mm Width)
Package
16-lead SOIC Narrow
Circuit
Fluorescent Ballast IC
Offset Voltage (v)
625
Output Source Current Min (ma)
250
Output Sink Current Min (ma)
400
Vcc Range (v)
10-25V with UVLO
Output Voltage Min (v)
10
Output Voltage Max (v)
25
Special Ic
Fully Integrated
Pbf
PbF Option Available
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*IR21571S

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
IR21571S
Manufacturer:
IR
Quantity:
20 000
Company:
Part Number:
IR21571S
Quantity:
55 000
Company:
Part Number:
IR21571S
Quantity:
33
Part Number:
IR21571STR
Manufacturer:
IR
Quantity:
191
Part Number:
IR21571STRPBF
Manufacturer:
IR
Quantity:
20 000
Company:
Part Number:
IR21571STRPBF
Quantity:
9 000
Company:
Part Number:
IR21571STRPBF
Quantity:
25 780
Features
Description
The IR21571 is a fully integrated, fully protected 600V ballast control IC designed
to drive virtually all types of rapid start fluorescent lamp ballasts. Externally pro-
grammable features such as preheat time & frequency, ignition ramp characteris-
tics, and running mode operating frequency provide a high degree of flexibility for
the ballast design engineer. Comprehensive protection features such as protec-
tion from failure of a lamp to strike, filament failures, low dc bus conditions, thermal
overload, or lamp failure during normal operation, as well as an automatic restart
function, have been included in the design. The heart of this control IC is a variable
frequency oscillator with externally programmable deadtime. Precise control of a
50% duty cycle is accomplished using a T-flip-flop. The IR21571 is available in both
16 pin DIP and 16 pin narrow body SOIC packages.
Typical Connection
www.irf.com
Programmable preheat time & frequency
Programmable ignition ramp
Protection from failure-to-strike
Lamp filament sensing & protection
Protection from operation below resonance -
0.2V CS threshold sync’d to falling edge on LO
Protection from low-line condition
Automatic restart for lamp exchange
+ Rectified AC Line
V
BUS
+ V
return
BUS
FULLY INTEGRATED BALLAST CONTROL IC
C
START
C
PH
R
C
T
T
R
R
C
R1
C1
START
OC
RAMP
R
R
R
RUN
PH
DT
R2
RUN
VDC
CPH
RPH
RT
CT
DT
OC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
COM
HO
VS
VB
CS
SD
LO
R
R
C
D
C
GHS
Supply
R3
BS
BOOT
Thermal overload protection
Programmable deadtime
Integrated 600V level-shifting gate driver
Internal 15.6V zener clamp diode on VCC
Micropower startup (150uA)
Latch immunity protection on all leads
ESD protection on all leads
Parts also available LEAD-FREE
VCC
Not recommended for new design:
C2
R4
R
GLS
R
CS
IR21571(S) & (PbF)
R5
D1
Data Sheet PD No. 60179 revM
C
C
D2
BLOCK
SNUBBER
please use IRS21571D
L
RES
Packages
C
RES
16 Lead SOIC
(narrow body)
16 Lead PDIP
1

Related parts for IR21571S

IR21571S Summary of contents

Page 1

FULLY INTEGRATED BALLAST CONTROL IC Features Programmable preheat time & frequency Programmable ignition ramp Protection from failure-to-strike Lamp filament sensing & protection Protection from operation below resonance - 0.2V CS threshold sync’d to falling edge on LO Protection from low-line ...

Page 2

IR21571 (S) & (PbF) Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal ...

Page 3

Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol Definition V High side floating supply voltage BS V Steady state high side floating supply offset voltage S V Supply voltage CC I Supply ...

Page 4

IR21571 (S) & (PbF) Electrical Characteristics (cont 14V +/- 0.25V BIAS 20. 0.5V Floating Supply Characteristics Symbol Definition I ...

Page 5

Electrical Characteristics (cont 14V +/- 0.25V BIAS 20. 0.5V Characteristics RUN Symbol Definition I Open circuit RUN lead leakage ...

Page 6

IR21571 (S) & (PbF) Functional Block Diagram 3.0V VDC 1 5.1V 1.0uA CPH 2 10V 5.1V 4.0V 4.0V RPH 3 2. 2.0V RUN ...

Page 7

IR21571 State Diagram SD > 2.0V (Lamp Removal) or VCC < 9.5V (Power Turned Off) FAULT Mode T > 160C J Fault Latch Set (Over-Temperature -Bridge Off 2 I 150 A QCC CPH = 0V VCC = 15.6V ...

Page 8

IR21571 (S) & (PbF) Description of Operation & Component Selection Tips Supply Bypassing and PC Board Layout Rules Component selection and placement on the pc board is extremely important when using power control ICs. V should be bypassed to COM ...

Page 9

The Control Sequence & Timing Component Selection The IR21571 uses the following control sequence (Figure 3) to drive rapid start fluorescent lamps. f Start Run f min 5V V CPH 2V V RPH 2V V RUN Ignition ...

Page 10

IR21571 (S) & (PbF) 10 tDEAD (usec RDT (Kohms) Figure 5: Deadtime versus R CPH RPH IGN RUN RUN START START ...

Page 11

Ignition Preheat Ramp Figure 7: Lamp filament voltage during the preheat, ignition ramp and run modes. The Preheat Time is programmed by means of the preheat capacitor internal 1 A current PH source, and an internal threshold ...

Page 12

IR21571 (S) & (PbF) Lamp Protection & Automatic Restart Circuitry Operation Three leads on the IR21571 are used for protection, as shown in Figure 10 below. These are V monitor), S (unlatched shutdown BUS VDC 3.0V R2 ...

Page 13

VDC CPH HO-VS RUN mode Low VDC Figure 11: VDC lead fault and auto restart Lamp Presence Detection and Automatic Restart The second protection lead, SD, is used for both unlatched shutdown ...

Page 14

IR21571 (S) & (PbF) Thus, for a lamp removal and replacement, the ballast automatically restarts the lamp in the proper manner, maximizing lamp life and minimizing stress on the power MOSFETs or IGBTs. The SD lead contains an internal 7.5V ...

Page 15

Figure 16: Hard switching condition Figure 17: Operation below resonance www.irf.com IR21571 (S) & (PbF) Figure 18: Auto restart for lamp replacement Recovery from such a fault condition is accomplished by cycling either the SD lead or the V a ...

Page 16

IR21571 (S) & (PbF) rectifie d +V BUS AC line VDC GHS CPH BOOT R RPH VB SUPPLY BOOT RT VCC 4 13 RUN COM C VCC ...

Page 17

Case outlines www.irf.com IR21571 (S) & (PbF) 16-Lead PDIP 16-Lead SOIC (narrow body) 01-6015 01-3065 00 (MS-001A) 01-6018 01-3064 00 (MS-012AC) 17 ...

Page 18

... SPN code) Assembly site code Per SCOP 200-002 Leadfree Part 16-Lead PDIP IR21571 order IR21571PbF 16-Lead SOIC IR21571S order IR21571SPbF Description of Change “Not Recommended for new design: Please use IRS21571D” Data and specifications subject to change without notice. IR logo 6/10/2008 www ...

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