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Part: L6590D013TR
Category:
Description: Fully Integrated Power Supply
Company: ST Microelectronics, Inc.
Datasheet: Download L6590D013TR datasheet File size : 1147 kB
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Datasheet text preview:
L6590
FULLY INTEGRATED POWER SUPPLY
s s s s s
s
s s s
WIDE-RANGE MAINS OPERATION "ON-CHIP" 700V V(BR)DSS POW ER 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 SHUTDOW N W ITH HYSTERESIS BROWN OUT PROTECTION (SMD PACKAGE ONLY)
MINIDIP
SO16W
ORDERING NUMBERS: L6590N L6590D
s
- HOME APPLIANCES/LIGHTING LINE CARD, DC-DC CONVERTERS
MAIN APPLICATIONS s WALL PLUG POWER SUPPLIES UP TO 15 W s AC-DC ADAPTERS s AUXILIARY POW ER SUPPL IES F OR: - CR T AND LCD MONITOR (BLUE ANGEL) - DESKTOP PC/SERVER - FAX, TV, LASER PRIN TER TYPICAL APPLICATION CIRCUIT
DESCRIPTION The L6590 is a monolithic switching regulator designed 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 lateral power MOSFET with a typical RDS(on) of 13 and a V(BR)DSS of 700V minimum.
AC line 88 to 264 Vac
Pout up to 15W
AC line 88 to 264 Vac
Pout up to 15W
DRAIN
D RAI N
1
1
L6590
3
Vcc
L6590
3 6, 7 , 8 5
COMP
V cc
6 , 7, 8
GND COMP
4
5
VFB
4
GN D
VFB
Primary Feedback
Secondary Feedback
October 2000
1/23
L6590
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 applications 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 BLOCK DIAGRA M
DRAIN (1) [1]
START-UP
efficiency (Pin < 1W @ Pout = 0.5W with wide range mains). Internal protections like cycle-by-cycle current limiting, latched output overvoltage protection, mains undervoltage protection (SMD version only) and thermal shutdown 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) internally connected in order for heat to be easily removed from the silicon die. An heatsink can then be realized by simply making provision of few cm2 of copper on the PCB. Furthermore, the pin(s) close to the high-voltage one are not connected to ease compliance with safety distances on the PCB.
[x] : L6590D (SO16W)
THERMAL SHUTDOW N
SUPPLY & UVLO
VRE F
+ -
VCC (3) [4]
OVP
V REF
SGND [5]
BOK [6]
VFB (5) [8]
BROW NOUT
+ + -
GND (6,7,8) PGND [9, ..., 16]
OCP PW M
2.5V
STANDBY
-
OSC 65/22 kHz
+
2.5V
COMP (4) [7]
PIN CONNECTIONS (Top view)
DRAIN DRAIN N.C. Vcc COMP GND GND GND VFB N.C. N.C. Vcc SGND BOK COMP MINIDIP L6590 VFB SO16W L6590D
PGND PGND PGND PGND PGND PGND PGND PGND
2/23
L 6590
PIN FUNCTIONS
Pin# Name L6590 1 2 3 L6590D 1 2, 3 4 DRAIN N.C. V CC Drain connection of the internal power MOSFET. The internal high voltage start-up generator sinks current from this pin. Not internally connected. Provision for clearance on the PCB. 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 startup threshold. The PWM is stopped if the voltage at the pin exceeds a certain value. Output of the Error Amplifier. Used for control loop compensation or to directly control PWM with an optocoupler. 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. 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. 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 k resistor. Current return for the bias current of the IC. Connection of the source of the internal MOSFET. Pins connected to the metal frame to facilitate heat dissipation. Description
4 5 6 to 8 -
7 8 6
COMP VFB GND BOK
-
5 9 to 16
SGND PGND
THERMAL DATA
Symbol Rthj-amb Rthj-pins Parameter Thermal Resistance Junction to ambient (*) Thermal Resistance Junction to pins Minidip 35 to 60 15 SO16W 40 to 65 20 Unit °C/W °C/W
(*) Value depending on PCB copper area and thickness.
ABSOLUTE MAXIMUM RATINGS
Symbol Vds Id Vcc Iclamp Drain Source Voltage Drain Current IC Supply Voltage Vcc Zener Current Error Amplifier Ouput Sink Current Voltage on Feedback Input BOK pin Sink Current Ptot Tj Tstg Power Dissipation at Tamb < 50°C (Minidip and SO16W) 3 cm2, 2 oz copper dissipating area on PCB Operating Junction Temperature Storage Temperature -40 to 150 -40 to 150 °C °C Parameter Value -0.3 to 700 0.7 18 20 3 5 1 1.5 Unit V A V mA mA V mA W
3/23
Others parts begin by l6
L6-1 L6-2 L6-3
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