Datasheet

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Features

•

Intelligent half-bridge driver

•

Auto Resetting Short Circuit Protection

•

Auto Resetting Overload Protection

• Externally Triggerable Latching Shutdown

• Latching Overtemperature Protection

• Frequency Modulation dither (for lower EMI)

• Micropower Startup (<300 μA)

• Phase Cut dimmable for leading / trailing edge

• Output Voltage Shift Compensation.

• Real Softstart

• Adaptive Dead Time

• Small 8 Pin DIP/SOIC Package

• Also available LEAD-FREE (PbF)

Data Sheet No. PD60219 rev C

HALOGEN CONVERTOR CONTROL IC

Typical Connections

IR2161(S) & (PbF)

Description

The IR2161 is a dedicated Intelligent Half bridge Driver IC for a Halogen convertor (electronic transformer). It

includes all necessary protection features and also allows the Convertor to be dimmed externally with a

standard phase cut dimmer with both leading or trailing edge types. This IC provides the advantage of reduced

thermal stress in the lamp due to softstart. There is also compensation of the output voltage for load regulation.

It enables the convertor to operate with extremely low harmonic distortion over the full range of loads. The

IR2161 includes adaptive deadtime to allow cool running MOSFETs and improves the EMI behaviour due to

frequency modulation (dither). All the features are integrated in a small 8 pin DIP/SOIC package to allow for a

size reduction in the next generation of convertors.

www.irf.com 1

Packages

8-Lead PDIP

IR2161

8-Lead SOIC

IR2161S

Note: Throughout this data sheet convertor is spelled in accordance with standard IEC 61047 DC or AC supplied convertors

for filament lamps  Performance requirements.

AC LINE

INPUT

12VAC

OUTPUT

IR2161

VCC

COM

CSD

CLF

CSD

RCS

CVCC1

CCS

CVCC2

D1 D2

D3 D4

CSNUB

C3 C4

R2 C2

DCP1

DCP2

Summary of content (20 pages)

PAGE 1
Data Sheet No. PD60219 rev C IR2161(S) & (PbF) HALOGEN CONVERTOR CONTROL IC Packages Features • Intelligent half-bridge driver • Auto Resetting Short Circuit Protection • Auto Resetting Overload Protection • Externally Triggerable Latching Shutdown • Latching Overtemperature Protection • Frequency Modulation dither (for lower EMI) • Micropower Startup (<300 μA) • Phase Cut dimmable for leading / trailing edge • Output Voltage Shift Compensation.
PAGE 2
IR2161(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 resistance and power dissipation ratings are measured under board mounted and still air conditions. Symbol Definition Min. Max. Units VB High side floating supply voltage -0.
PAGE 3
IR2161(S) & (PbF) Electrical Characteristics VCC = VBS = VBIAS = 14V, +/- 0.25V, VCSD = 5.0V, CLO =CHO = 1000 pF, and TA = 25°C unless otherwise specified. Supply Characteristics Symbol Definition VCCUV+ Min. Typ. Max. 11.5 12.1 12.7 VCCUVL- VCC supply undervoltage positive going threshold VCC supply undervoltage negative going threshold VCC supply softstart reset negative going — — 5.5 IQCCUV UVLO mode quiescent current — 250 300 ICCFLT Fault-mode quiescent current — 1.4 2.
PAGE 4
IR2161(S) & (PbF) Electrical Characteristics (cont’d) VCC = VBS = VBIAS = 14V, +/- 0.25V, VCSD = 5.0V, CLO =CHO = 1000 pF, and TA = 25°C unless otherwise specified. Shutdown Circuit Characteristics Symbol Definition Min. Typ. Max. 0.64 1.4 12 120 0.56 1.2 9 100 0.
PAGE 5
IR2161(S) & (PbF) Electrical Characteristics (cont.) VCC = VBS = VBIAS = 14V, +/- 0.25V, VCSD = 5.0V, CLO =CHO = 1000 pF, and TA = 25°C unless otherwise specified. Soft Start Characteristics Symbol Definition Min. Typ. ISS Soft start CSD charge current fSS Soft start frequency 115 Min. Typ. 0.5 Max. Units mA Max.
PAGE 6
IR2161(S) & (PbF) Power Turned On UVLO Mode VCC < 5.5V (VCCUVL-) (Power Turned Off) 1 /2 -Bridge Off IQCC ≅ 300 μA VCC > 12.1V(VCCUV+) STANDBY Mode 1/ -Bridge Off IQCC ≅ 300 μA Oscillator Off o T J <135 C (Tjmax) Oscillator On VCC < 5.5V (VCCUVL-) (Power Turned Off) Oscillator Off CSD = 0V FAULT Mode VCC > 12.1V (VCCUV+) T J <135oC (Tjmax) 2 1/ 2 -Bridge Off Oscillator Off Oscillator On VCC < 10.
PAGE 7
IR2161(S) & (PbF) 0.54V Block Diagram www.irf.
PAGE 8
IR2161(S) & (PbF) Halogen Convertor Controller Functional Description Under-voltage Lock-Out Mode (UVLO) The under-voltage lockout mode (UVLO) is defined as the state the IC is in when VCC is below the turn-on threshold. To identify the different modes of operation, refer to the State Diagram shown on page 7 of this data sheet.
PAGE 9
IR2161(S) & (PbF) minimum frequency over a period of around 1s (assuming CSD=100nF). During this time the external capacitor at the CSD pin charges from 0V to 5V, controlling the oscillator frequency through the internal voltage controlled oscillator (VCO). The value of CSD will determine the duration of the soft start sweep. However, since it also governs the shut down circuit delays, the value should be kept at 100nF to achieve the datasheet operation.
PAGE 10
IR2161(S) & (PbF) across the CSD capacitor will vary from 0V if there is no load to approximately 5V at maximum load. This is provided that the correct value of current sense resistor has been selected for the maximum rated load and line voltage supply of the convertor. This should be 0.33 Ohm (0.5W) for a 100W system running from a 220-240V AC line.
PAGE 11
IR2161(S) & (PbF) convertor is close to maximum load. If the load is reduced, the average level at which the ripple occurs (i.e. the DC component) will be at a lower level. I_SC 12V CS S Q R Q Enable Outputs 1.2V Shut Down Circuit The IR2161 contains a dual mode auto-resetting shutdown circuit that detects both a short circuit or overload condition in the convertor. The load current detected at the CS pin is used to sense these conditions.
PAGE 12
IR2161(S) & (PbF) In addition, any time Vcs exceeds VCSLATCH (approximately half Vcc), this latching shutdown function will be triggered and the system will remain in FAULT mode until VCC is re-cycled. The IR2161 also includes over temperature shutdown, which latches the convertor off when the die temperature of the IC exceeds 130-135°C. Experimental measurements reveal that the die temperature will be no more than 20°C above the ambient temperature at all operating frequencies inside the convertor.
PAGE 13
IR2161(S) & (PbF) I CS ( RMS ) P = LOAD V AC Since the load is resistive the current waveform will have a sinusoidal envelope and so the peak can be easily determined taking into account that the current has a high frequency component with an approximate 50% duty cycle: I CS ( PK ) = 2 2 × I CS ( RMS ) Therefore: VCS ( PK ) = I CS ( PK ) × RCS For correct operation at maximum load the peak voltage should be 0.4V. The calculation can be simplified by combining the formulae, RCS = 0.
PAGE 14
IR2161(S) & (PbF) of the power MOSFETs in the half-bridge will be at a maximum. At lighter loads there may be hard switching if the VS voltage is unable to slew all the way or it slews so rapidly that the voltage begins to turn around again before the IR2161 is able to switch on the relevant MOSFET in the half bridge. Such a situation is not desirable but may be acceptable at lighter loads where the conduction losses are small.
PAGE 15
IR2161(S) & (PbF) DC BUS VOLTAGE DC BUS VOLTAGE LAMP VOLTAGE LAMP VOLTAGE Figure 13, Trailing Edge Dimming Figure 14, Leading Edge Dimming Trailing edge dimmers are less common however than leading edge dimmers. This is because they are more expensive to make and need to incorporate a pair of MOSFETs or IGBTs whereas a leading edge dimmer is based around a single triac.
PAGE 16
IR2161(S) & (PbF) 15 5 VCCUV+ 12 4 VCC(V) IQCC (mA) VCCUV- 9 6 3 0 -25 ICCHF 3 ICCLF 2 1 0 25 50 75 100 IQCCFLT 0 -25 125 0 Temperature (°C) 50 75 100 125 Temperature (°C) Graph : VCCUV+/- vs TEMP (IR2161) Graph : IQCC vs TEMP (IR2161) 6 20 VCCLAMP_25ma 15 5 VCCLAMP_5ma VCSDMAX 4 VCSD (V) VCCLAMP_5_25ma 25 10 3 2 5 1 VCSDMIN 0 -25 0 25 50 75 100 125 Temperature (°C) Graph : VCCLAMP_5_25ma vs TEMP (IR2161) 16 0 -25 0 25 50 75 100 125 Temperature (°
PAGE 17
IR2161(S) & (PbF) 20 1.5 15 VCS_SC I (uA) VCSOL, VCSSC (V) 2 1 0.5 5 VCS_OL 0 -25 0 25 50 I_OL 10 I_RESET 75 100 0 -25 125 0 50 75 100 125 I_RESET, I_OL vs TEMP (IR2161) VCS_OL, VCS_SC vs TEMP (IR2161) 12 100 VCSD_SD I_SC 9 VCSD (V) 90 I(uA) 25 Temperature (°C) Temperature (°C) 80 6 VCSD_OL 70 3 60 0 -25 VCSD_RS -25 0 25 50 75 Tem perature (°C) I_SC vs TEMP (IR2161) www.irf.
PAGE 18
IR2161(S) & (PbF) 175 1 0.8 FSS 125 100 75 Iss (uA) Frequency (kHz) 150 FRUN 0.6 0.4 50 0.2 25 0 -25 FMIN 0 25 50 75 100 Temperature (°C) Frequency vs TEMP (IR2161) 18 125 0 -25 0 25 50 75 100 125 Temperature (°C) Graph : Iss (uA) vs TEMP (IR2161) www.irf.
PAGE 19
IR2161(S) & (PbF) Case outlines 01-6014 01-3003 01 (MS-001AB) IR2161 8-Lead PDIP ' $ )22735,17 ; > @ + > @ ( ; H $ > @ ; > @ H ; E > @ $ $ ; > @ 0,//,0(7(56 0,1 0$; %$6,& %$6,& .
PAGE 20
IR2161(S) & (PbF) LEADFREE PART MARKING INFORMATION Part number Date code IRxxxxxx YWW? Pin 1 Identifier ? P MARKING CODE Lead Free Released Non-Lead Free Released IR logo ?XXXX Lot Code (Prod mode - 4 digit SPN code) Assembly site code Per SCOP 200-002 ORDER INFORMATION Basic Part (Non-Lead Free) 8-Lead PDIP IR2161 order IR2161 8-Lead SOIC IR2161S order IR2161S Leadfree Part 8-Lead PDIP IR2161 order IR2161PbF 8-Lead SOIC IR2161S order IR2161SPbF IR WORLD HEADQUARTERS: 233 Kansas St.