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L6590D013TR

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L6590
October 2000
■ WIDE-RANGE MAINS OPERATION
■ "ON-CHIP" 700V V(BR)DSS POWER MOS
■ 65 kHz INTERNAL OSCILLATOR
■ 2.5V ± 2% INTERNAL REFERENCE
■ STANDBY MODE FOR HIGH EFFICIENCY AT
LIGHT LOAD
■ OVERCURRENT AND LATCHED
OVERVOLTAGE PROTECTION
■
NON DISSIPATIVE BUILT-IN START-UP CIRCUIT
■ THERMAL SHUTDOWN WITH HYSTERESIS
■ BROWNOUT PROTECTION (SMD PACKAGE
ONLY)
MAIN APPLICATIONS
■ WALL PLUG POWER SUPPLIES UP TO 15 W
■ AC-DC ADAPTERS
■ AUXILIARY POWER SUPPLIES FOR:
- CRT AND LCD MONITOR (BLUE ANGEL)
- DESKTOP PC/SERVER
- FAX, TV, LASER PRINTER
- HOME APPLIANCES/LIGHTING
■ LINE CARD, DC-DC CONVERTERS
DESCRIPTION
The L6590 is a monolithic switching regulator de-
signed in BCD OFF-LINE technology, able to operate
with wide range input voltage and to deliver up to
15W output power. The internal power switch is a lat-
eral power MOSFET with a typical R
DS(on)
of 13
Ω
and a V
(BR)DSS
of 700V minimum.
MINIDIP SO16W
ORDERING NUMBERS:
L6590N L6590D
FULLY INTEGRATED POWER SUPPLY
TYPICAL APPLICATION CIRCUIT
3
1
56, 7,8
L6590
AC line
88 to 264 Vac
4
Vcc
VFBCOMP
DRAIN
GND
Pout
up to 15W
Primary Feedback
3
1
56, 7, 8
L6590
AC line
88 to 264 Vac
4
Vcc
VFB COMP
DRAIN
GND
Pout
up to 15W
Secondary Feedback
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
L6590
2/23
DESCRIPTION
(continued)
The MOSFET is source-grounded, thus it is possible
to build flyback, boost and forward converters.
The device can work with secondary feedback and a
2.5V±2% internal reference, in addition to a high gain
error amplifier, makes possible also the use in appli-
cations either with primary feedback or not isolated.
The internal fixed oscillator frequency and the integrated
non dissipative start-up generator minimize the external
component count and power consumption.
The device is equipped with a standby function that
automatically reduces the oscillator frequency from
65 to 22 kHz under light load conditions to enhance
efficiency (P
in
<1W@P
out
= 0.5W with wide range
mains).
Internal protections like cycle-by-cycle current limiting,
latched output overvoltage protection, mains undervolt-
age protection (SMD version only) and thermal shut-
down generate a 'robust' design solution.
The IC uses a special leadframe with the ground pins
(6, 7 and 8 in minidip, 9 to16 in SO16W package) in-
ternally connected in order for heat to be easily re-
moved from the silicon die. An heatsink can then be
realized by simply making provision of few cm
2
of
copper on the PCB. Furthermore, the pin(s) close to
the high-voltage one are not connected to ease com-
pliance with safety distances on the PCB.
BLOCK DIAGRAM
PIN CONNECTIONS
(Top view)
SUPPLY
&UVLO
OVP
OCP
+
-
+
-
2.5V
+
-
DRAIN
(1)
[1]
V
CC
(3)
[4]
BOK
[6]
COMP
(4)
[7]
GND
(6,7,8)
PGND
[9, ..., 16]
VREF
BROWNOUT
PWM
STANDBY
START-UP
OSC
65/22 kHz
THERMAL
SHUTDOWN
2.5V
-
+
VFB
(5)
[8]
VREF
SGN
D
[5]
[x] : L6590D (SO16W)
VFB
DRAIN
N.C.
Vcc
COMP
GND
GND
GND
MINIDIP
L6590
DRAIN
N.C.
N.C.
Vcc
SGND
BOK
COMP
VFB
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
SO16W
L6590D
Obsolete Product(s) - Obsolete Product(s)
3/23
L6590
PIN FUNCTIONS
THERMAL DATA
(*) Value depending on PCB copper area and thickness
.
ABSOLUTE MAXIMUM RATINGS
Pin#
Name Description
L6590 L6590D
1 1 DRAIN Drain connection of the internal power MOSFET. The internal high voltage start-up
generator sinks current from this pin.
2 2, 3 N.C. Not internally connected. Provision for clearance on the PCB.
34V
CC
Supply pin of the IC. An electrolytic capacitor is connected between this pin and ground.
The internal start-up generator charges the capacitor until the voltage reaches the start-
up threshold. The PWM is stopped if the voltage at the pin exceeds a certain value.
47
COMP
Output of the Error Amplifier. Used for control loop compensation or to directly control
PWM with an optocoupler.
5 8 VFB Inverting input of the Error Amplifier. The non-inverting one is internally connected to a
2.5V± 2% reference. This pin can be grounded in some feedback schemes.
6 to 8 - GND Connection of both the source of the internal MOSFET and the return of the bias current
of the IC. Pins connected to the metal frame to facilitate heat dissipation.
- 6 BOK Brownout Protection. If the voltage applied to this pin is lower than 2.5V the PWM is
disabled. This pin is typically used for sensing the input voltage of the converter through
a resistor divider. If not used, the pin can be either left floating or connected to Vcc
through a 15 kΩ resistor.
- 5 SGND Current return for the bias current of the IC.
- 9 to 16 PGND Connection of the source of the internal MOSFET. Pins connected to the metal frame to
facilitate heat dissipation.
Symbol Parameter Minidip SO16W Unit
R
thj-amb
Thermal Resistance Junction to ambient (*) 35 to 60 40 to 65 °C/W
R
thj-pins
Thermal Resistance Junction to pins 15 20 °C/W
Symbol Parameter Value Unit
V
ds
Drain Source Voltage -0.3 to 700 V
I
d
Drain Current 0.7 A
V
cc
IC Supply Voltage 18 V
I
clamp
V
cc
Zener Current 20 mA
Error Amplifier Ouput Sink Current 3 mA
Voltage on Feedback Input 5 V
BOK pin Sink Current 1 mA
P
tot
Power Dissipation at T
amb
< 50°C (Minidip and SO16W)
3cm
2
, 2 oz copper dissipating area on PCB
1.5 W
T
j
Operating Junction Temperature -40 to 150 °C
T
stg
Storage Temperature -40 to 150 °C
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L6590D013TR

Mfr. #:
Buy L6590D013TR
Manufacturer:
STMicroelectronics
Description:
AC/DC Converters 700 Volt Monolithic
Lifecycle:
New from this manufacturer.
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