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IR2157

Features: • Programmable preheat time & frequency• Programmable ignition ramp• Protection from failure-to-strike• Lamp filament sensing & protection• Protection from operation below resonance• Protection from low-line condition & automatic restart (m...

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SeekIC No. : 004376112 Detail

IR2157: Features: • Programmable preheat time & frequency• Programmable ignition ramp• Protection from failure-to-strike• Lamp filament sensing & protection• Protection...

IR2157 Data Sheet

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Part Number:
IR2157
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/21

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Product Details

Description



Features:

• Programmable preheat time & frequency
• Programmable ignition ramp
• Protection from failure-to-strike
• Lamp filament sensing & protection
• Protection from operation below resonance
• Protection from low-line condition & automatic restart (mimics a magnetic ballast)
• Thermal overload protection
• Programmable deadtime
• Integrated 600V level-shifting gate driver
• Internal 15.6V zener clamp diode on VCC
• True micropower startup (150uA)
• Latch immunity protection on all leads
• ESD protection on all leads


Pinout

Connection Diagram


Specifications

Symbol
 Definition
Min.
Max.
Units
VB
 High side floating supply voltage
-0.3
625
V
VS
 High side floating supply offset voltage
VB - 25
VB + 0.3
VHO
 High side floating output voltage
VS - 0.3
VB + 0.3
VLO
 Low side output voltage
-0.3
VCC + 0.3
IOMAX
 Maximum allowable output current (HO, LO)
due to external power transistor miller effect
-500
500
mA
IRT
 RT pin curren
-5
5
VCT
 CT pin voltage
-0.3
VCC + 0.3
V
ICPH
 CPH pin current
-5
5
mA
VRPH
 RUN pin voltage
-0.3
VCC + 0.3
V

VRUN

 RUN pin voltage
-0.3
VCC + 0.3
VDT
 Deadtime pin voltage
-0.3
5.5
VCS
 Current sense pin voltage
-0.3
5.5
VSD
 Shutdown pin voltage
-0.3
5.5
ICC
 Supply current (note 1)
-
20
mA
dV/dt
 Allowable offset voltage slew rate
-50
50
V/ns
PD
 Package power dissipation @ TA +25°C

(16 lead PDIP)
-
1.60



 

(16 lead SOIC)
-
1.25
RthJA
 Thermal resistance, junction to ambient

(16 lead PDIP)
-
75
/W

(16 lead SOIC)

-
100
TJ
 Junction temperature
-55
150
TS
 Storage temperature
-55
150
TL
 Lead temperature (soldering, 10 seconds)
-
300



Description

The  IR2157 is a fully integrated, fully protected 600V ballast control IC designed to drive virtually all types of rapid start fluorescent lamp ballasts. Externally program- mable features such as preheat time & frequency, ignition ramp characteristics, and running mode operating frequency provide a high degree of flexibility for the ballast design engineer.  Comprehensive protection features of the IR2157 such as protection 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 programmmable deadtime. Precise control of a 50% duty cycle is accomplished using a T-flip-flop. The IR2157 is available in both 16 pin DIP and 16 pin narrow body SOIC packages.




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