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
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