Semelab Plc IP3524BN, IP3524BJ, IP2524BN, IP2524BD, IP1524BJ-BSS2 Datasheet

LAB

SEME

IP1524B SERIES

Semelab plc. Telephone [phone]. Telex: 341927. Fax [phone].

Prelim. 3/95

REGULATING

PULSE WIDTH

MODULATORS

FEATURES

• Pin Compatible with IP1524 Series

• 7 to 40 volt operation

• 5 volt reference trimmed to ±1%

• Undervoltage lockout

• Excellent external sync capability

• Wide current limit common mode range

• +5 Volt error amplifier common mode

• PWM data latch

• Full double-pulse suppression logic

• 50ns shutdown function

• Dual 200mA, 60V output transistors

• Fully specified over temperature

+V

IN

Input Voltage
Collector Voltage
Logic Inputs
Current Limit Sense Inputs
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
+60V

–0.3 to +5.5V

–0.3 to +V

IN

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. IN P UT

N. I. INPUT

OSC. OUTPUT

+C.L. SENSE

–C.L. SE NSE

R

T

C

T

GROUND

V

REF

V

IN

E

B

C

B

C

A

E

A

SHUTDOWN

COMPENSATION

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

IP1524B ✔ -55 to +125°C
IP2524B ✔✔✔-25 to +85°C
IP3524B ✔✔✔0 to +70°C

Order Information

Note:

To order, add the package identifier to the part number.
eg. IP1524BJ

IP3524BD–16

LAB

SEME

IP1524B SERIES

Semelab plc. Telephone [phone]. Telex: 341927. Fax [phone].

Prelim. 3/95

E

C

C.L.

+C.L.

SENSE

–C.L.

SENSE

INV.

INPUT

N.I.

INPUT

T

T

6

7

OSCILLATOR

R

C

15

8

REFERENCE
REGULATOR

GND

UNDER
VOLTAGE
LOCKOUT

TO INTERNAL

CIRCUITRY

OSC.

D

S

Q

Q

S

QR Q

T

Q

1

2

5

4

COMPENSATION

SHUTDOWN

9

10

PWM

LATCH

MEMORY

F/F

TOGGLE

F/F

PWM

ERROR

+V

IN

V

REF

16

3

C

E

B

B

A

A

11

12

13

14

+7 to +40V

0 to +60V

+2.3 to V

REF

0 to VIN– 2.5V
0 to 200mA

0 to 20mA
25µA to 1.8mA
50Hz to 500kHz

2kΩ to 150kΩ

1nF to 0.1µF
–55 to +125°C

–25 to +85°C

0 to +70°C

RECOMMENDED OPERATING CONDITIONS

DESCRIPTION

The IP1524B is a pulse width modulator for switching power supplies which features improved performance over
industry standards like the SG1524. A direct pin-for-pin replacement for the earlier device, it combines advanced
processing techniques and circuit design to provide improved reference accuracy/ and extended common mode range at
the error amplifier and current limit inputs. A DC-coupled flip-flop eliminates triggering and glitch problems, and a PWM
data latch prevents edge oscillations. The circuit incorporates true digital shutdown for high speed response, while an
undervoltage lockout circuit prevents spurious outputs when the supply voltage is too low for stable operation. Full
double-pulse suppression logic insures alternating output pulses when the shutdown pin is used for pulse-by-pulse
current limiting.

BLOCK DIAGRAM

V

IN

Input Voltage
Collector Voltage
Error Amp Common Mode Range
Current Limit Sense Common Mode Range
Output Current (each transistor)
Reference Load Current
Oscillator Charging Current
Oscillator Frequency Range

R

T

Oscillator Timing Resistor

C

T

Oscillator Timing Capacitor
Operating Ambient Temperature Range IP1524B

IP2524B
IP3524B

NOTES

1. Test Conditions unless otherwise stated:

V

IN

= 20V , I

REF

= 0.

T

J

= –55 to +125°C for IP1524B

T

J

= –25 to +85°C for IP2524B

T

J

= 0 to +70°C for IP3524B

2. R

T

= 2.7KΩ , CT= 0.01µF unless otherwise stated.

LAB

SEME

IP1524B SERIES

Semelab plc. Telephone [phone]. Telex: 341927. Fax [phone].

Prelim. 3/95

4.3 5.2 6.5

0.1 0.3 0.6
710

4.90 5.00 5.10

4.85 5.15
115
525

40 75

25 70 120

1

39 43 47

0.1 1
12

80 140

400 700

3.0 4.0

0.4 0.5 1.2

3.7 4.0

0.6 1 1.1

-1

210
110

0.1 1

4.3 5.2 6.5

0.1 0.3 0.6
710

4.95 5.00 5.05

4.90 5.10
110
515

40 75

25 70 120

110

41 43 45

0.1 1
12

80 140

400 700

3.0 4.0

0.4 0.5 1.2

3.7 4.0

0.6 1 1.1

-1

0.1 5
15

0.1 1

IP1524B
IP2524B IP3524B

Parameter Test Conditions

1

Min. Typ. Max. Min. Typ. Max. Units

VINUndervoltage Threshold
Turn–on Hysteresis
Operating Current

Output Voltage

Line Regulation
Load Regulation
Temperature Stability
Short Circuit Current

Long Term Stability

Initial Accuracy
Voltage Stability
Temperature Stability
Minimum Frequency
Maximum Frequency
Clock Amplitude
Clock Pulse Width
Sawtooth Peak Voltage
Sawtooth Valley Voltage
Sawtooth Valley T.C.

Input Offset Voltage
Input Bias Current
Input Offset Current

V

IN

Rising

V

IN

= 7 to 40V

T

J

= 25°C

V

IN

= 7 to 40V IL= 0 to 20mA

V

IN

= 7 to 40V

I

L

= 0 to 20mA

V

REF

= 0

T

J

= 25°C

T

J

= 25°C

V

IN

= 7 to 40V

R

T

= 150kΩ CT= 0.1µF

R

T

= 2kΩ CT= 470pF

Output, Pin 3 C

T

= 0.01µF

Output, Pin 3 C

T

= 0.01µF

C

T

= 0.01µF

C

T

= 0.01µF

T

J

= 25°C

V

CM

= 2.3 to V

REF

VCM= 2.3 to V

REF

VCM= 2.3 to V

REF

V

mA

V

mV

mA

mV

khr

kHz

%

Hz

kHz

V

µs

V

mV/°C

mV

µA

ELECTRICAL CHARACTERISTICS (T

J

= Over Operating Temperature Range unless otherwise stated)

ERROR AMP SECTION

OSCILLATOR SECTION

2

REFERENCE SECTION

TURN–ON CHARACTERISTICS