Datasheet IP3525AN, IP3525AJ, IP3525ADW, IP1525AJ-883B, IP1525AJ Datasheet (Semelab Plc)

LAB

SEME

IP1525A SERIES IP1527A SERIES

Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.

Prelim. 3/95

REGULATING

PULSE WIDTH

MODULATORS

FEATURES

• 8 to 35V operation

• 5.1V reference trimmed to ±1%

• 100Hz to 500kHz oscillator range

• Separate oscillator sync terminal

• Adjustable deadtime control

• Internal soft start

• Input undervoltage lockout

• Latching PWM to prevent multiple pulses

• Dual source/sink output drivers

+V

IN

Input Voltage Collector Voltage Logic Inputs Analogue Inputs Output Current, Source or Sink Reference Output Load Current Oscillator Charging Current

P

D

Power Dissipation TA= 25°C

Derate @ TA> 50°C

P

D

Power Dissipation TC= 25°C

Derate @ TC> 25°C

T

J

Operating Junction Temperature

T

STG

Storage Temperature Range

T

L

Lead Temperature (soldering, 10 seconds)

+40V +40V

–0.3 to +5.5V

–0.3 to +V

IN

500mA

Internally Limited

5mA

1W

10mW/°C

2W

16mW/°C

See Ordering Information

–65 to +150°C

+300°C

ABSOLUTE MAXIMUM RATINGS (T

case

= 25°C unless otherwise stated)

TOP VIEW

J Package – 16 Pin Ceramic DIP N Package – 16 Pin Plastic DIP D Package – 16 Pin Plastic (300) SOIC

8

1

2

3

4

5

6

7

14

13

12

11

10

9

15

16

INV. INPUT

N. I. INPUT

OSC. OUTPUT

SOFT START

DISCHARGE

SYNC

V

REF

V

IN

OUTPUT B

GROUND

SHUTDOWN

COMPENSATION

C

V

OUTPUT A

C

T

R

T

Part J–Pack N–Pack D–16 Temp. Number 16 Pin 16 Pin 16 Pin Range

IP1525A ✔ -55 to +125°C IP1527A ✔ -55 to +125°C IP3525A ✔✔✔0 to +70°C IP3527A ✔✔✔0 to +70°C

Order Information

Note:

To order, add the package identifier to the part number. eg. IP1525AJ

IP3527AD–16

LAB

SEME

IP1525A SERIES IP1527A SERIES

Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.

Prelim. 3/95

Q

PWM

INV.

INPUT

N.I.

INPUT

1

2

ERROR AMP

T

OSCILLATOR

R

C

OSC. OUTPUT

6

5

TO INTERNAL

CIRCUITRY

V

REF

16

15

12

REFERENCE REGULATOR

GND

+V

IN

3

SYNC

4

DISCHARGE

+V

IN

COMPENSATION

SOFT START

8

V

REF

50µA

SHUTDOWN

10

5k

Ω

U.V.

LOCKOUT

FLIP

FLOP

S

R

LATCH

OUTPUT A

V

C

11

14

13

OUTPUT B

5k

Ω

9

7

IP1525A OUTPUT STAGE

OUTPUT A

V

C

11

14

13

OUTPUT B

IP1527A OUTPUT STAGE

+8 to +35V

+4.5 to +35V

0 to 100mA 0 to 400mA 0 to 20mA

100Hz to 400kHz

2kΩ to 200kΩ

470pF to 0.1µF

0 to 500Ω

–55 to +125°C

0 to +70°C

RECOMMENDED OPERATING CONDITIONS

BLOCK DIAGRAM

V

IN

Input Voltage Collector Voltage Sink/Source Load Current (Steady State) Sink/Source Load Current (Peak) Reference Load Current Oscillator Frequency Range

R

T

Oscillator Timing Resistor

C

T

Oscillator Timing Capacitor Deadtime Resistor Range Operating Ambient Temperature Range IP1525A / IP1527A

IP3525A / IP3527A

DESCRIPTION

The IP1525A and IP1527A families of PWM switching regulator control circuits offer improved performance and lower parts count when used in designing switching power supplies. Included are 5.1 volt reference, error amplifier, adjustable dead-time oscillator with synchronisation capability, latched PWM comparator, totem-pole output drivers, shutdown, soft start, and undervoltage lockout.

The IP1525A and IP1527A differ only in output phasing. The IP1525A output is low when “off ”, while the IP1527A output is high when “off”.

Output Voltage Line Regulation Load Regulation Temperature Stability Total Output Variation Short Circuit Current Output Noise Voltage

Long Term Stability

Initial Accuracy Voltage Stability Temperature Stability Minimum Frequency Maximum Frequency Current Mirror Clock Amplitude Clock Width Sync Threshold Sync Input Current

Input Offset Voltage Input Bias Current Input Offset Current DC Open Loop Gain Gain Bandwidth Product

T

J

= 25°C

V

IN

= 8 to 35V

I

L

= 0 to 20mA

Over Line, Load and Temp. V

REF

= 0

f = 10 Hz to 10kHz

V

IN

= 8 to 35V

R

T

= 200kΩ CT= 0.1µF

R

T

= 2kΩ CT= 470pF

I

RT

= 2mA

T

J

= 25°C

Sync Voltage = 3.5V

R

L

≥ 10MΩ

T

J

= 25°C

LAB

SEME

IP1525A SERIES IP1527A SERIES

Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.

Prelim. 3/95

IP1525A IP3525A IP1527A IP3527A

Parameter Test Conditions Min. Typ. Max. Min. Typ. Max. Units

ELECTRICAL CHARACTERISTICS (T

J

= Over Operating Temperature Range unless otherwise stated)

5.0 5.1 5.2 220 550

20 50

4.95 5.25 80 100 40 200

150

26 12 36

90 120

400 600

1.7 2.0 2.2

3.0 3.5

0.3 0.5 1.0

1.2 2.0 2.8

1.0 2.5

210 110

1

60 75

12

5.05 5.10 5.15 210 550

20 50

5.0 5.2 80 100 40 200

110

26

0.3 1 36

90 120

400 600

1.7 2.0 2.2

3.0 3.5

0.3 0.5 1.0

1.2 2.0 2.8

1.0 2.5

0.5 5 110

1

60 75

12

V

mV

V

mA

µVrms

mV

kHr

%

Hz

kHz

mA

V

µs

V

mA

mV

µA

dB

MHz

REFERENCE SECTION

OSCILLATOR SECTION

2

ERROR AMPLIFIER SECTION

3

NOTES

1. Test Conditions unless otherwise stated: V

IN

= 20V

T

J

= –55 to +125°C for IP1525A / IP1527A

T

J

= 0 to +70°C for IP3525A / IP3527A

2. Oscillator Section Test Conditions: f

OSC

= 40kHz (RT= 3.6kΩ , CT= 0.01µF , RD= 0)

3. Error Amplifier Section Test Condition: V

CM

= 5.1V

4. Output Driver Section Test Condition: V

C

= 20V

VCM= 1.5 to 5.2V V

IN

= 8 to 35V

V

PIN1

– V

PIN2

≥ 150mV

V

PIN2

– V

PIN1

≥ 150mV Zero Duty Cycle Max. Duty Cycle

V

SHUTDOWN

= 0V

V

SHUTDOWN

= 2V To Outputs V

SHUTDOWN

= 2.5V V

SHUTDOWN

= 2.5V TJ= 25°C

I

SINK

= 20mA

I

SINK

= 100mA

I

SOURCE

= 20mA

I

SOURCE

= 100mA

V

COMP

= High

V

C

= 35V

C

L

= 1nF TJ= 25°C

C

L

= 1nF TJ= 25°C

V

IN

= 35V

Output Low Level

Output High Level Common Mode Rejection Supply Voltage Rejection

Minimum Duty Cycle Maximum Duty Cycle Input Threshold Input Threshold Input Bias Current

Soft Start Current Soft Start Low Level Shutdown Threshold Shutdown Input Current Shutdown Delay

Output Low Level

Output High Level

Undervoltage Lockout Output Leakage Rise Time Fall Time

Supply Current

IP1525A IP3525A IP1527A IP3527A

Parameter Test Conditions Min. Typ. Max. Min. Typ. Max. Units

0.2 0.5

3.8 5.6 60 75 50 60

0

45 49

0.6 0.9

3.3 3.6

0.05 1.0

25 50 80

0.4 0.6

0.6 1.3 2.0

0.1 1.0

0.2 0.5

0.2 0.4

1.0 2.0 18 19 17 18

578

200

100 600

50 300

10 20

0.2 0.5

3.8 5.6 60 75 50 60

0

45 49

0.6 0.9

3.3 3.6

0.05 1.0

25 50 80

0.4 0.6

0.6 1.3 2.0

0.1 1.0

0.2 0.5

0.2 0.4

1.0 2.0 18 19 17 18

578

200

100 600

50 300

10 20

V

dB

%

V

µA

V

mA

µs

V

µA

ns

mA

LAB

SEME

IP1525A SERIES IP1527A SERIES

Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.

Prelim. 3/95

NOTES

1. Test Conditions unless otherwise stated: V

IN

= 20V

T

J

= –55 to +125°C for IP1525A / IP1527A

T

J

= 0 to +70°C for IP3525A / IP3527A

2. Oscillator Section Test Conditions: f

OSC

= 40kHz (RT= 3.6kΩ , CT= 0.01µF , RD= 0)

3. Error Amplifier Section Test Condition: V

CM

= 5.1V

4. Output Driver Section Test Condition: V

C

= 20V

ELECTRICAL CHARACTERISTICS (T

J

= Over Operating Temperature Range unless otherwise stated)

PWM COMPARATOR

ERROR AMPLIFIER SECTION (cont.)

3

SHUTDOWN SECTION

OUTPUT DRIVERS (each output)

4

TOTAL STANDBY CURRENT

13

A

B

IP1525A

+V

C

GND

12

11

14

+V

SUPPLY

R1

RETURN

T1

Q1

Q2

LAB

SEME

IP1525A SERIES IP1527A SERIES

Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.

Prelim. 3/95

APPLICATIONS INFORMATION

TO OUTPUT FILTER

13

R2

A

B

IP1525A

+V

C

GND

12

R1

11

14

+V

SUPPLY

RETURN

Q1

13

A

B

IP1525A

+V

C

GND

12

11

14

+V

SUPPLY

R1

RETURN

R2 C2

R3

C1

Q1

Q2

T1

13

A

B

IP1525A

+V

C

GND

12

+V

SUPPLY

Q1

T1

T2

Q2

11

14

R1

R2

RETURN

C1

C2

For single–ended supplies, the driver outputs are grounded. The V

C

terminal is switched to ground by the totem–pole

source transistors on alternate oscillator cycle.

In conventional push–pull bipolar designs, forward base drive is controlled by R1–R3. Rapid turn–off times for the power devices are achieved with speed–up capacitors C1 and C2.

Low power transformers can be driven directly by the IP1525A. Automatic reset occurs during deadtime when both ends of the primary winding are switched to ground.

The low source impedance of the output drivers provides rapid charging of power FET input capacitance while minimising external components.

LAB

SEME

IP1525A SERIES IP1527A SERIES

Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.

Prelim. 3/95

CHARGE TIME (µs)

10

100

200

11

ms

10

ms

1

2 5 20 5010 200 500100

2ms5

ms

2

5

20

50

R TIMING RESISTOR (k

Ω

)

T

C

=

1

n

F

T

C

=

2

n

F

T

C

=

5

n

F

T

C

=

0

.

0

1

µ

F

T

C

=

0

.

0

2

µ

F

T

C

=

0

.

0

5

µ

F

T

C

=

0

.

1

µ

F

T

7

5

R

T

R

D

C

T

6

DISCHARGE TIME (µs)

100

200

300

400

500

0

R DEADTIME RESISTOR (

Ω

)

D

C

=

1

n

F

T

C

=

2

n

F

T

C

=

5

n

F

T

C

=

0

.

0

1

µ

F

T

C

=

0

.

0

2

µ

F

T

C

=

0

.

0

5

µ

F

T

C

=

0

.

1

µ

F

T

0.2 1 10 100 200

0.5 522050

TYPICAL PERFORMANCE CHARACTERISTICS

Oscillator Charge Time vs

RTand C

T

Oscillator Discharge Time vs.

RDand C

T

FREQUENCY (Hz)

C

=

1

n

F

P

C

=

0

P

-20

0

20

40

60

80

100

1

10

100 1k 10k 100k 1M 10M

R = 20k

Ω

Z

R

=

0

Z

VOLTAGE GAIN (dB)

C

P

R

Z

9

1

2

1

2

3

4

OUTPUT CURRENT, SOURCE or SINK (A)

0

0.01 1

0.1 0.2 0.3 0.5 0. 70.02 0.03 0.05 0.07

SATURATION VOL TAGE (V)

V = 20V

IN

T = 25˚C

A

SOURCE SAT, V - V

OH

C

SINK SAT, V

OL

Error Amplifier Open–Loop

Frequency Response

IP1525A Output Saturation

Characteristics