Microsemi Corporation LX1563IM, LX1563IDM, LX1562IM, LX1562IDM Datasheet

LIN DOC #:

1562

LX1562/1563

S ECOND-GENERATION POWER FACTOR CONTROLLER

THE INFINITE POWER OF INNOVATION

DESCRIPTION KEY FEATURES

The LX1562 is a second-generation family of power factor correction controllers using a discontinuous mode of operation. They are optimized for electronic ballast applications. Many improvements have been made over the original SG3561A controller introduced by Silicon General Semiconductor in 1992.

New features include the addition of an internal start-up circuit eliminating bulky external components while allowing independent boost converter operation. Addition of internal current sense blanking eliminating the need for an external R/C filter network. Internal clamping of the error amplifier and multiplier outputs improves turn on overshoot characteristics and current limiting. Special circuitry has also been

added to prevent no load runaway conditions. And finally, output drive clamps limiting power MOSFET gate drive independent of supply voltage greatly enhance the products practical application.

Although the IC design has been optimized for electronic ballast applications, it can also be used for power factor correction in lower power (typ < 300W) AC-DC converters. One unique feature of the device is encompassed by the addition of internal logic circuitry to detect zero crossing of the inductor current thus maintaining the discontinuous current mode of operation. This feature prevents large current gaps from appearing thereby minimizing distortion and enhancing power factor correction.

PRODUCT HIGHLIGHT

TYPICAL APPLICATION OF THE LX1562 IN AN 80W

LUORESCENT LAMP BALLAST WITH ACTIVE POWER FACTOR CONTROL

450µH

61T #22AWG

AC-

C+

120V

D1 D3

EMI FILTER

1N4004

100k

½W

2.2M

1µF

250V

29k

.01µF

22µF

R10

4.7M

1N4935

22k

0.1µF

VINI

MULT

DET

COMP

LX1562

GND

OUT

INV

C.S.

1N4148

1 4

Ω

R9 620k

0.1µF

1/4W

P RODUCTION DATA SHEET

■■

■ INTERNAL START-UP CIRCUIT

■■

■ INTERNAL CURRENT SENSE BLANKING

■■

■ IMPROVED MICROPOWER START-UP

■■

CURRENT (300µA max.)

■■

■ CLAMPED E.A. OUTPUT FOR LOWER

■■

TURN-ON OVERSHOOT

■■

■ MULTIPLIER CLAMP LIMITS MAXIMUM

■■

INPUT CURRENT

■■

■ INTERNAL OVERVOLTAGE PROTECTION

■■

REPLACES BUILT-IN C.S. OFFSET

■■

■ PWM OUTPUT CLAMP LIMITS MOSFET

■■

GATE DRIVE VOLTAGE

■■

■ INCREASED UVLO HYSTERESIS REDUCES

■■

START-UP TIMING (LX1562 only)

■ LOW OPERATING CURRENT CONSUMPTION

■ INTERNAL 1.5% REFERENCE

■ TOTEM POLE OUTPUT STAGE

■ AUTOMATIC CURRENT LIMITING OF BOOST

STAGE

■ DISCONTINUOUS MODE OF OPERATION

WITH NO CURRENT GAPS

■ NO SLOPE COMPENSATION REQUIRED

APPLICATIONS

BOOST

MR854

230V

Ω

1RF730

11k

1.3

Ω

C6 100µF 400V

FLOURESCENT LAMP BALLAST

■■

■ ELECTRONIC BALLAST

■■

■ SWITCHING POWER SUPPLIES

A VAILABLE OPTIONS PER PART #

Part # Start-Up Hysteresis

LX1562 13.1V 5.2V

LX1563 9.8V 2.1V

Voltage Voltage

Note: Thick trace on schematic shows high-frequency, high-current path in circuit.

Lead lengths must be minimized to avoid high-frequency noise problems.

PACKAGE ORDER INFORMATION

(°C)

0 to 100 LX1562IM LX1562IDM

Plastic DIP

8-pin

Plastic SOIC

8-pin

0 to 100 LX1563IM LX1563IDM

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX1562IDMT)

FOR FURTHER INFORMATION CALL (714) 898-8121

11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841

LX1562/1563

PRODUCT DATABOOK 1996/1997

S ECOND-GENERATION POWER FACTOR CONTROLLER

RODUCTION DATA SHEET

ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage (VIN) ...................................................................................... -0.3V to 28V

Peak Driver Output Current (Note 3) ................................................................. ±500mA

Driver Output Clamping Diodes

> VCC or VO < -0.3V ........................................................................................ ±10mA

Detector Clamping Diodes

> 6V or V

DET

Error Amp, Multiplier, and Comparator Input Voltages ................................ -0.3V to 6V

< 0.9V ..................................................................................... ±10mA

DET

Detector Input Voltage (Note 2) ....................................................................... -0.3 to 6V

Operating Junction Temperature

Plastic (M and DM Packages) ............................................................................... 150°C

Storage Temperature Range ...................................................................... -65°C to 150°C

Lead Temperature (Soldering, 10 Seconds) ............................................................ 300°C

Note 1. Values beyond which damage may occur. All voltages are specified with respect to

ground, and all currents are positive into the specified terminal. Note 2. With no limiting resistor. Note 3. Current duty cycle is chosen such that T

is below 150°C.

THERMAL DATA

M PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

θθ

DM PACKAGE:

θθ

x θ

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

Junction Temperature Calculation: TJ = TA + (P

numbers are guidelines for the thermal performance of the device/pc-board system.

The θ

All of the above assume no ambient airflow

95°C/W

165°C/W

PACKAGE PIN OUTS

E.A. INV. E.A. OUT

MULT. INPUT

E.A. INV. E.A. OUT

MULT. INPUT

C.S.

1 8 27 36 45

C.S.

M PACKAGE

(Top View)

1 8 27 36 45

DM PACKAGE

(Top View)

V OUT GROUND I

DET

OUT GROUND I

DET

Rev. 1.3 12/96

PRODUCT DATABOOK 1996/1997

LX1562/1563

S ECOND-GENERATION POWER FACTOR CONTROLLER

P RODUCTION DATA SHEET

RECOMMENDED OPERATING CONDITIONS (Note 4)

Parameter

Symbol

Supply Voltage Range Peak Driver Output Current

Operating Ambient Temperature Range:

LX1562/1563

Note 4. Range over which the device is functional.

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX1562/1563 with 0°C ≤ TA ≤ 100°C; V testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)

Parameter

Symbol

Test Conditions

Under-Voltage Lockout Section

Start Threshold Voltage V

UV Lockout Hysteresis ∆V

LX1562 Only LX1563 Only

LX1562 Only

LX1563 Only

Supply Current Section

Start-Up Supply Current I

Operating Supply Current I Dynamic Operating Supply Current I

VIN < V

VIN = 12V, Output Not Switching VIN = 12V, 50kHz, CGS = 1000pF

Reference Section (Note 5)

Initial Accuracy (Note 8) VRI

Line Regulation ∆V Load Regulation ∆V Temperature Stability ∆V

= 0mA, TA = 25°C

REF

= 0mA

REF

12V < VIN < 25V

0 < I

< 2mA

REF

Error Amplifier Section

Input Bias Current I

Large Signal Open Loop Voltage Gain A Slew Rate S

Power Supply Rejection Ratio (Note 5) PSRR 11 to 25V Output Source Current I

Output Sink Current I

Output Voltage Range (Note 7) E.A. Unity Gain Bandwidth f

Phase Margin φ

(Note 5)

VOL

VOH = 3V

VOL = 2V

No Load on E.A. Output

Multiplier Section

Mult. Input Voltage Range V

M2 Input Voltage Range V

Mult. Input Bias Current (M1) I Multiplier Gain (Note 5 & 6) K V

Multiplier Gain Temperature Stability ∆K

Maximum Multiplier Output Voltage V

∆V

CLMPVM1

= 1V, ∆V

= 2V, V

EA0

= 0.5V to 1.5V, V

PIN1

= 2.7V to 3.3V

= V

EA0

= 0V

REF

+ 1V

(Electrical Characteristics continue next page.)

Recommended Operating Conditions

Min. Typ. Max.

11 25 V

±200 mA

0 100 °C

LX1562I/1563I

Min. Typ. Max.

12 13.1 14 V

9.2 9.8 10.6 V

4 5.2 6 V

1.7 2.1 2.5 V

2.465 2.50 2.535 V

2.44 2.56 V

-500 50 500 nA 60 80 dB

60 80 dB

-2 -4.5 mA 3 4.5 mA

1.2 3.8 V

02V

REF

0.55 0.68 0.8 V/V

0.55 0.61 0.75 V/V

1.1 1.24 1.45 V

Units

=12V. Low duty cycle pulse

Units

200 300 µA

58mA

610mA

0.1 mV

1.3 mV 20 m V

0.63 V/µsec

1.7 MHz 49 °

+ 1 V

-0.24 µA

-0.2 %/°C

REF

PRODUCT DATABOOK 1996/1997

LX1562/1563

S ECOND-GENERATION POWER FACTOR CONTROLLER

RODUCTION DATA SHEET

ELECTRICAL CHARACTERISTICS (Con't.)

Parameter

Symbol

Test Conditions

Current Sense Comparator Section

Input Bias Current I Current Sense Delay to Output t

C.S. Blanking Time t

C.S. Input Offset Voltage V

0V ≤ VCS ≤ 1.7V

CSB

E.A.

BLK

OFFVEA0

= 3.7V, VCS = 0 to 1.2V, VM1 = 1V

OUT

= 2.2V, VM1 = 0V, I

DETC

= 0V

Detect Section

Input Voltage Threshold - High V Hysteresis H

Input LO Clamp Voltage V

Input HI Clamp Voltage V Input Current I

Input HI/LO Clamp Diode Current I

DLIDET

DZIDET

1V ≤ V

DMXVDET

= 100µA

= 3mA

≤ 6V

DET

< 0.9V, V

DET

> 6V

Restart Timer Section

Restart Time t

RST

Output Driver Section

Output High Voltage V

Output Low Voltage V

Output Rise Time t Output Fall Time tfCL = 1000pF

Maximum Output Voltage V

Notes: 5. Because the reference is not brought out externally, these specifications are tested at probe only, and cannot be tested on the packaged part.

They are guaranteed by design, and shown for illustrative purposes only.

∆V

6. K = ≈ (∆V

) x (V

C.S.

- V

)

EA0

REF

7. This parameter, although guaranteed, is not tested in production.

8. Initial accuracy includes input offset voltage of error amplifier.

= -10mA, VIN = 12V

PRHIL

= 10mA, VIN = 12V

PRLIL

CL = 1000pF

DRMXVIN

∆V

C.S.

) (∆V

)

EA0

= 20V

LX1562I/1563I

Min. Typ. Max.

-1 -0.3 1 µA 280 500 ns

0.4 0.9 1.2 µs

-20 3 20 mV

1.6 1.72 1.9 V 180 240 300 mV

0.4 0.62 0.85 V

7.0 7.8 8.6 V

-1 -0.2 1 µA

300 µsec

8.5 9 V

0.8 1 V

130 200 ns

50 120 ns

13 13.8 15 V

Units

±3 mA

Rev. 1.3 12/96

PRODUCT DATABOOK 1996/1997

S ECOND-GENERATION POWER FACTOR CONTROLLER

P RODUCTION DATA SHEET

BLOCK DIAGRAM / PIN DESCRIPTIONS

LX1562/1563

E.A. INV.

E.A. OUT

OUT

C.S.

Internal

300

13.1V (1562)

9.8V (1563)

Ω

1.72V

MULT

DET

5.2V (1562)

2.1V (1563)

REF

TIMER

Bias

6.8V To All

Internal Circuitry

UVLO

1µs

Delay

LATCH

2.5V REF

1.24V

C.S.

REF

Input

1.8V

EMI

Filter

C.S.

REF

FUNCTIONAL DESCRIPTION

Pin # Description

GND 6

INV 1

E.A. OUT 2

MULT IN 3

C.S. 4

DET

OUT 7

Input supply voltage.

Input supply voltage return. Must always be the lowest potential of all the pins.

Inverting input of the Error Amplifier. The output of the Boost converter should be resistively divided to 2.5V and connected to this pin.

The output of the Error Amplifier. A feedback compensation network is placed between this pin and the INV pin.

Input to the multiplier stage. The full-wave rectified AC is divided to less than 2V and is connected to this pin.

Input to the PWM comparator. Current is sensed in the Boost stage MOSFET by a resistor in the source lead, and is fed to this pin. An internal blanking circuit eliminates the RC low pass filter that otherwise is required to eliminate leading edge spike.

A current driven logic input with internal clamp. A second winding on the Boost inductor senses the flyback voltage associated with the zero crossing of the inductor current and feeds it to the I

PWM output pin. A totem-pole output stage specially designed for direct driving the MOSFET.

pin through a limiting resistor. Low on this pin causes VO (pin 7) to go high.

DET

LX1562/1563

PRODUCT DATABOOK 1996/1997

S ECOND-GENERATION POWER FACTOR CONTROLLER

RODUCTION DATA SHEET

GRAPH / CURVE INDEX

Characteristic Curves

FIGURE #

1. E.A. OUTPUT VOLTAGE vs. C.S. THRESHOLD

2. MULTIPLIER INPUT VOLTAGE vs. C.S. THRESHOLD

=1V, V

3. MULTIPLIER GAIN (V

4. REFERENCE VOLTAGE (Including Offset) vs. TEMPERATURE

5. E.A. INPUT BIAS CURRENT vs. TEMPERATURE

6. E.A. SINK CURRENT @2V vs. TEMPERATURE

7. START-UP SUPPLY CURRENT vs. TEMPERATURE (LX1563)

8. START-UP SUPPLY CURRENT vs. TEMPERATURE (LX1562)

9. START-UP THRESHOLD vs. TEMPERATURE (LX1562)

10. START-UP THRESHOLD vs. TEMPERATURE (LX1563)

11. UV LOCKOUT HYSTERESIS vs. TEMPERATURE (LX1562)

12. UV LOCKOUT HYSTERESIS vs. TEMPERATURE (LX1563)

THRESHOLD HIGH vs. TEMPERATURE

13. I

DET

14. I

INPUT HYSTERESIS vs. TEMPERATURE

DET

15. RUN-AWAY COMPARATOR THRESHOLD vs. TEMPERATURE

16. C.S. DELAY TO OUTPUT vs. TEMPERATURE

17. C.S. BLANKING TIME vs. TEMPERATURE

18. RESTART TIME vs. TEMPERATURE

19. FALL TIME vs. TEMPERATURE

20. RISE TIME vs. TEMPERATURE

21. SUPPLY CURRENT vs. SUPPLY VOLTAGE (LX1562)

22. SUPPLY CURRENT vs. SUPPLY VOLTAGE (LX1563)

22a. MAXIMUM MULTIPLIER OUTPUT VOLTAGE vs. TEMPERATURE

=3.5V) vs. TEMPERATURE

EA0

FIGURE INDEX

IC Description

FIGURE #

23. INDUCT CURRENT

24. TYPICAL APPLICATION OF START-UP CIRCUITRY

25. START-UP CAPACITOR VOLTAGE

26. VOLTAGE REFERENCE vs. TEMPERATURE

27. THE AMPLIFIER CONFIGURED AS AN INTEGRATOR FOR LOOP

COMPENSATION

28. MULTIPLIER SECTION

29. CURRENT SENSE SECTION

30. START-UP TIMER

Application Information

FIGURE #

31. TYPICAL APPLICATION OF THE LX1562 IN AN 80W FLUORESCENT

LAMP BALLAST WITH ACTIVE POWER FACTOR CONTROL

32. NORMALIZED OPERATING FREQUENCY vs. OFF-TIME DUTY CYCLE

33. INDUCT CURRENT

34. LOAD TRANSIENT RESPONSE CIRCUIT

35. FLYBACK VOLTAGE ACROSS I

WINDING

DET

Typical Applications

FIGURE #

36. TYPICAL APPLICATION OF THE LX1562 IN AN 80W FLUORESCENT

LAMP BALLAST WITH ACTIVE POWER FACTOR CONTROL - 120V

37. TYPICAL APPLICATION OF THE LX1562 IN AN 80W FLUORESCENT

LAMP BALLAST WITH ACTIVE POWER FACTOR CONTROL - 220V

38. TYPICAL APPLICATION OF THE LX1562 IN AN 80W FLUORESCENT

LAMP BALLAST WITH ACTIVE POWER FACTOR CONTROL - 277V

Rev. 1.3 12/96

PRODUCT DATABOOK 1996/1997

2.47

2.45

(TA) Ambient Temperature - (°C)

2.52

) Reference Voltage - (V)

2.48

-50

-25 0

50 75 100 125

VCC = 12V C

= 1nF

2.46

2.49

2.50

2.51

)

S ECOND-GENERATION POWER FACTOR CONTROLLER

P RODUCTION DATA SHEET

CHARACTERISTIC CURVES

LX1562/1563

FIGURE 1. — E.A. OUTPUT VOLTAGE vs. C.S. THRESHOLD

1.4

VM1 = 3V

1.2

VM1 = 2.5V

1.0

0.8

0.6

C.S. Threshold - (V)

0.4

0.2

VM1 = 1.5V

VM1 = 2V

VM1 = 1V

TA = 25°C

2.6

2.4 2.8

3.233.43.6

3.8

E.A. Output Voltage - (V

FIGURE 3. — MULTIPLIER GAIN (V

vs. TEMPERATURE

=1V, V

EA0

=3.5V)

FIGURE 2. —

1.4

1.2

1.0

0.8

0.6

0.4

C.S. Threshold Voltage - (V)

0.2

MULTIPLIER INPUT VOLTAGE vs. C.S. THRESHOLD

= 4V

EA0

= 3.5V

EA0

0.4

00.8

1.61.2 2 2.4

TA = 25°C

= 3V

EA0

= 3.25V

EA0

Multiplier Input Voltage - (V

FIGURE 4. — REFERENCE VOLTAGE (Including Offset)

vs. TEMPERATURE

= 2.5V

3.2

3.62.8

0.80

0.75

0.70

0.65

0.60

(K) Multiplier Gain - (1/V)

0.55

0.50

-50

-25 0

50 75 100 125

(TA) Ambient Temperature - (°C)

VCC = 12V

= 1nF

= 3.5V

EA0

= 1V

LX1562/1563

100.0

0.0

(TA) Ambient Temperature - (°C)

350.0

) Start-up Supply Current - (µA)

150.0

-50

-25 0

50 75 100 125

VIN < V

CL = 1nF

50.0

200.0

250.0

300.0

LX1562

4.0

3.0

(TA) Ambient Temperature - (°C)

6.0

) E.A. Sink Current @2V - (mA)

4.5

-50

-25 0

50 75 100 125

VCC = 12V C

= 1nF

EA0

= 2V

3.5

5.0

5.5

PRODUCT DATABOOK 1996/1997

S ECOND-GENERATION POWER FACTOR CONTROLLER

RODUCTION DATA SHEET

CHARACTERISTIC CURVES

FIGURE 5. — E.A. INPUT BIAS CURRENT vs. TEMPERATURE

0.5

0.4

0.3

0.2

0.1

0.0

-0.1

-0.2

) E.A. Input Bias Current - (µA)

-0.3

-0.4

-0.5

-50

-25 0

VCC = 12V C

= 1nF

E.A.- = 2.5V

50 75 100 125

FIGURE 6. —

E.A. SINK CURRENT @2V vs. TEMPERATURE

(TA) Ambient Temperature - (°C)

FIGURE 7. — START-UP SUPPLY CURRENT vs. TEMPERATURE FIGURE 8. — START-UP SUPPLY CURRENT vs. TEMPERATURE

350.0

LX1563

0.0

-50

VIN < V CL = 1nF

-25 0

(TA) Ambient Temperature - (°C)

300.0

250.0

200.0

150.0

100.0

) Start-up Supply Current - (µA)

50.0

50 75 100 125

Rev. 1.3 12/96

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