IR2157 View Datasheet(PDF) - International Rectifier

Part Name

Description

Manufacturer

IR2157

FULLY INTEGRATED BALLAST CONTROL IC

International Rectifier 

IR2157

ADVANCED INFORMATION

Electrical Characteristics (cont.)

RPH Characteristics

Symbol Definition

IRPHLK Open circuit RPH pin leakage current

VRPHFLT Fault-mode RPH pin voltage

Min.

—

—

RUN Characteristics

Symbol Definition

IRUNLK Open circuit RUN pin leakage current

VRUNFLT Fault-mode RUN pin voltage

Min.

—

—

Protection Circuitry Characteristics

Symbol Definition

VSDTH+

VSDHYS

VCSTH+

VCSTH-

TCS

Rising shutdown pin threshold voltage

Shutdown pin threshold hysteresis

Over-current sense threshold voltage

Under-current sense threshold voltage

Over-current sense propogation delay

Min.

—

—

—

—

—

VDC+

VDC-

TSD

Low VBUS/rectified line input upper threshold —

Low VBUS/rectified line input lower threshold —

Thermal shutdown junction temperature

—

Gate Driver Output Characteristics

Symbol Definition

VOL

VOH

tr

tf

Low-level output voltage

High level output voltage

Turn-on rise time

Turn-off fall time

Min.

—

—

—

—

Typ.

0.1

0

Typ.

0.1

0

Typ.

2.0

150

1.0

0.2

160

5.15

3.0

175

Typ.

0

0

85

45

Max.

—

—

Units Test Conditions

µA VRPH = 5V,VRPH = 5V

mV

SD = 5V, CS = 2V,

or Tj > TSD

Max.

—

—

Units Test Conditions

µA

VRUN = 5V

mV

SD = 5V, CS = 2V,

or Tj > TSD

Max.

—

—

—

—

—

—

—

—

Units Test Conditions

V

mV

V

nsec

Delay from CS to LO

or HO

V

oC

Max.

100

100

150

100

Units Test Conditions

mV

Io = 0

VBIAS - VO, Io = 0

nsec

Note 4: When the IC senses an overtemperature condition (Tj > 175ºC), the IC is latched off. In order to reset this Fault

Latch, the SD pin must be cycled high and then low, or the VCC supply to the IC must be cycled below the

falling undervoltage lockout threshold (VCCUV-).

6

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