SGS Thomson Microelectronics L6590 Datasheet



FULLY INTEGRATED POWER SUPPLY FIPS

Features

WIDE-RANGE MAINS OPERATION
”ON-CHIP” 700V BVDSS POWERMOS
65kHzINTERNAL OSCILLATOR

2.5V ±2%INTERNALREFERENCE
STANDBY MODE FOR HIGH EFFICIENCY

AT LIGHT LOAD
OVERCURRENT AND LATCHED OVERVOL-

TAGE PROTECTION
NON DISSIPATIVE BUILT-INSTART-UP CIR-

CUIT
ON-CHIP SOFT START AND THERMAL

SHUTDOWN

Main Applications

WALLPLUGPOWERSUPPLYUP TO15W
AC-DC ADAPTORS
AUXILIARYPOWER SUPPLY:

- MONITORS (BLUE ANGEL)

- DESKTOPS/SERVERS

- FAX,TV, LASER PRINTERS

- HOME APPLIANCES/LIGHTING
LINECARD, DC-DC CONVERTERS

L6590

PRODUCT PREVIEW

Minidip SO16W

DESCRIPTION

The L6590 is a monolithicswitching regulator de­signed in BCDOFF-LINE technology,able to op­erate with wide range input voltage and delivering
an output power up to 13W. The internal switch.
is implemented by a lateral high voltage power
Mosfet with an Rdson of 13Ω and a BVDss of
700V. The internal fixed oscillator frequency, non
dissipative start up and the internal soft start sys­tem allow to minimize the components count. A

2.5V+/-2% internalreference in addition to a high
gain error amplifier make the device suitable for
low cost applications with primary control.

Internal protectionslike cycle by cycle current lim­iting, output overvoltage protection and thermal
shutdowngenerate a ’robust’design solution.

The device automatically reduces the frequency
from 65KHz to 22KHz under light load conditions
improvingthe efficiency.

TYPICALAPPLICATIONCIRCUIT

PO=15W

AC

LINE

85VACto 265V

May 1999

This is preliminary information on a new product now in development. Details are subject to change without notice.

AC

DRAIN

V

V

REF

+

-

CC

VFB

2.5V

D98IN857

+

­OVER

CURRENT

L6590

SUPPLY
& UVLO

OVER

VOLTAGE

V

REF

+

-

OSC

100KHz

PWM

VCOMPGND

1/8

L6590

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

ds

I

d

V

cc

P

tot

T

j

T

stg

PINS CONNECTION(Top views)

Drain Source Voltage 700 V
Drain Current 0.7 A
Supply Voltage 18 V
Error Amplifier Output Sink Current 3 mA
Power Dissipation at T

<50°C (Minidip) 1 W

amb

Junction Operating Temperature Range -40 to 150 °C
Storage Temperature -40 to 150 °C

DRAIN

N.C.

V

CC

VCOMP

1
2
3
4 VFB

D98IN854A

GND8
GND

7

GND

6
5

DRAIN

N.C.
N.C.

V

CC

SGND

ENABLE

VCOMP

VFB

1
2
3
4
5
6
7 PGND
8 PGND9

D98IN855A

15
14
13
12
11
10

PGND16
PGND
PGND
PGND
PGND
PGND

MINIDIP SO16W

THERMAL DATA

Symbol Parameter Minidip SO16W Unit

R

th j-amb

R

th j-amb

(*) Value depending from PCB copper areas and thikness.

Thermal ResistanceJunction to Ambient Free Air 60 - °C/W
Thermal ResistanceJunction to Ambient (*) 35 to60 35 to 60 °C/W

ELECTRICALCHARACTERISTICS (T

= 0to 105°C,Vcc= 10V)

j

Power Section

Symbol Parameter Test Condition Min. Typ. Max. Unit

Drain Source Voltage Id= 500µA 700 V
Off State Drain Current Vds= 560V 500
Drain Source on state

Resistance

Id= 25mA; Tj = 25°C1317
Tj = 125°C2635

2/8

BV

R

I

dss
dson

dss

A

µ

Ω
Ω

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

Error Amp Section

L6590

V

fb

Input Voltage Tj = 25°C 2.45 2.5 2.55 V

Tj = 125°C 2.43 2.5 2.57 V

I

b

Input Bias Current -0.3 -1
Avol 60 dB

B Unity Gain Bandwidth 0.7 1 MHz

SVR Supply Voltage Rejection 70 dB

I

source

V

V

oh

ol

Output Source Current Vcomp = 3.5V 0.5 1 mA
V

High I

out

V

Low I

out

= 0.5mA Vfb= 2V 3.8 4.5 V

source

= 1mA Vfb= 3V 1.0 V

sink

OscillatorSection

F

osc

Dmin Min. Duty Cycle Vcomp = 1V 0 %

Dmax Max. Duty Cycle 66 70 74 %

Oscillator Frequency Tj = 25°C 586572KHz

56 65 74 KHz

Device Operation Section

I

op

I

psc

V

z

V

ddon

V

ddoff

Operating Supply Current 6 8 mA
Peak Start up Current Vcc= 0V 5 10 15 mA
Zener Voltage 17 17.5 18 V
Start Threshold Voltage 14 14.5 15 V
Min Operating Voltage After

7 7.5 8 V

Turn on

Soft Start

V

ccss

Soft Start Threshold Voltage 12 12.5 13 V

Circuit Protections

A

µ

I

lim

Pulse by Pulse Current Limit dI/dt= 0.2A/µs 500 625 700 mA

OVP Over Voltage Protection 15 15.5 16 V

t

m

Internal Masking Time 120 ns

Stand by Section

I

pksb

F

stb

I

pknor

PN/OFF/BROWN-OUT

V

th on

I

Hyst

I

off

I

p

V

CL

THERMAL SHUTDOWN (*)

(*) Parameter not tested in production.

Current Threshold for Stand-By
Operation

Transition from 65KHz to
22KHz

70 mA

Stand by Frequency Tj = 25°C 192327KHz
Current Threshold for Normal

Operation
Stand by current f

Transition from 22KHz to

170 mA

65KHz

= fstand-by 5 7.5 mA

SW

Threshold Voltage (Device on) 2.425 2.5 2.575 V
Source Current V
Supply Current in Off Condition V
Source Current V
On/Off Clamp Pull-Up Voltage I

=3V 305070

pin

= 2V 0.5 mA

pin

=2V 5 mA

pin

= 0.5mA 5 5.5 6 V

sink

Thermal Shutdown 150 165 °C
Hysteresis 40 °C

A

µ

3/8

L6590

APPLICATIONEXAMPLES
Figure 1. AC-DC Adaptor, AuxiliaryP.S. (Isolated bias winding feedback)

AC LINE

85V

to 265V

AC

WIDE RANGE MAINS
FULLY ISOLATED SOLUTION
MINIMUM COMPONENTS COUNT

Figure 2. High Performance AC-DC Converter.(Secondaryreferenced optcouplerfeedback)

AC LINE

to 265V

85V

AC

AC

DRAIN

V

L6590

GND

AC

CC

VFB

COMP

D98IN850

L6590

WIDE RANGE MAINS
FULLY ISOLATED SOLUTION
EXCELLENT OUTPUT PRECI-

SION ANDREGULATION

Figure 3. High Voltage DC-DC Converter.

NOT ISOLATION
MINIMUM PARTS COUNT
EXCELLENT OUTPUT PRECISION
STEP DOWN OR STEP UP TOPOLOGIES

GND

VFB

GND

DRAIN

V

CC

COMP

COMP

L6590

DRAIN

V

CC

VFB

D98IN851

D98IN852

4/8

APPLICATIONEXAMPLE(continued)
Figure 4. Line Card Application. (Isolated bias winding feedback)

0

DRAIN

V

CC

VFB

MINIMUM COMPONENTS COUNT
FULLY ISOLATED SOLUTION

L6590

-48V

GND

COMP

L6590

+5V

-5V

D98IN853

5/8

L6590

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 2.35 2.65 0.093 0.104

A1 0.1 0.3 0.004 0.012

B 0.33 0.51 0.013 0.020

C 0.23 0.32 0.009

D 10.1 10.5 0.398 0.413

E 7.4 7.6 0.291 0.299

e 1.27 0.050

H 10 10.65 0.394 0.419

h 0.25 0.75 0.010 0.030

L 0.4 1.27 0.016 0.050

K0°(min.)8° (max.)

mm inch

0.013

OUTLINE AND

MECHANICAL DATA

SO16 Wide

L

hx

45

A

B

e

K

A1

C

H

D

16

9

E

1

8

6/8

L6590

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430
E 7.95 9.75 0.313 0.384

e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300

F 6.6 0.260

I 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060

mm inch

OUTLINE AND

MECHANICAL DATA

Minidip

7/8

L6590

Information furnished is believedto be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

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 1999 STMicroelectronics – Printed in Italy – All Rights Reserved

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