L6599ATDTR datasheet, PDF - EEWORLD Datasheet

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L6599ATDTR: DescriptionAC to DC Switching Converter Resonant Controller 500kHz T/R 16-Pin SO N; CategoryPower/power management The power supply circuit; File Size684KB，32 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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L6599ATDTR Overview

AC to DC Switching Converter Resonant Controller 500kHz T/R 16-Pin SO N

L6599ATDTR Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Topology	Resonant Controller
Minimum Supply Voltage (V)	8.85
Maximum Supply Voltage (V)	16
Maximum Operating Current (mA)	5
Switching Frequency (kHz)	500
Soft Start Option	Yes
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	150
Packaging	Tape and Reel
Standard Package Name	SOP
Pin Count	16
Supplier Package	SO N
Mounting	Surface Mount
Package Height	1.6(Max)
Package Length	10(Max)
Package Width	4(Max)
PCB changed	16
Lead Shape	Gull-wing

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L6599AT

Improved high voltage resonant controller

Datasheet

production data

Applications



LCD and PDP TV



Desktop PC, entry-level server



Telecom SMPS



High efficiency industrial SMPS



AC-DC adapter, open frame SMPS

Features



50% duty cycle, variable frequency control of

resonant half bridge



High accuracy oscillator



Up to 500 kHz operating frequency



Two-level OCP: frequency-shift and latched

shutdown



Interface with PFC controller



Latched disable input



Burst mode operation at light load



Input for power-ON/OFF sequencing or

brownout protection



Non-linear soft-start for monotonic output

voltage rise



600 V - rail compatible high-side gate driver

with integrated bootstrap diode and high dv/dt

immunity



-300/700 mA high-side and low-side gate

drivers with UVLO pull-down



Guaranteed for extreme temperature ranges

Table 1. Device summary

Order code

L6599ATD

L6599ATDTR

Package

SO16N

Packaging

Tube

Tape and reel

June 2017

This is information on a product in full production.

DocID15534 Rev 8

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www.st.com

Contents

L6599AT

Contents

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1

4.2

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.1

6.2

6.3

6.4

6.5

6.6

6.7

Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Operation at no load or very light load . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Current sense, OCP and OLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Latched shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Line sensing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Bootstrap section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.1

SO16N package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

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DocID15534 Rev 8

L6599AT

Description

The L6599AT is an improved revision of the previous L6599A. It is a double-ended controller

specific to series-resonant half bridge topology. It provides 50% complementary duty cycle:

the high-side switch and the low-side switch are driven ON/OFF 180° out-of-phase for

exactly the same time. Output voltage regulation is obtained by modulating the operating

frequency. A fixed deadtime inserted between the turn-off of one switch and the turn-on of

the other guarantees soft-switching and enables high-frequency operation.

To drive the high-side switch with the bootstrap approach, the IC incorporates a high voltage

floating structure able to withstand more than 600 V with a synchronous-driven high voltage

DMOS that replaces the external fast-recovery bootstrap diode.

The IC enables the designer to set the operating frequency range of the converter by means

of an externally programmable oscillator.

At startup, to prevent uncontrolled inrush current, the switching frequency starts from a

programmable maximum value and progressively decays until it reaches the steady-state

value determined by the control loop. This frequency shift is non-linear to minimize output

voltage overshoots; its duration is programmable as well.

At light load the IC may enter a controlled burst mode operation that keeps the converter

input consumption to a minimum.

IC functions include a not-latched active-low disable input with current hysteresis useful for

power sequencing or for brownout protection, a current sense input for OCP with frequency

shift and delayed shutdown with automatic restart. A higher level OCP latches off the IC if

the first-level protection is not sufficient to control the primary current. Their combination

offers complete protection against overload and short-circuits. An additional latched disable

input (DIS) allows easy implementation of OTP and/or OVP.

An interface with the PFC controller is provided that enables the pre-regulator to be

switched off during fault conditions, such as OCP shutdown and DIS high, or during burst

mode operation.

DocID15534 Rev 8

3/32

L6599AT

Pin connection

Figure 2. Pin connection (top view)

Table 2. Pin description

Pin no.

Type

Function

Soft-start. This pin connects an external capacitor to GND and a resistor to RFmin (pin 4)

that set both the maximum oscillator frequency and the time constant for the frequency shift

that occurs as the chip starts up (soft-start). An internal switch discharges this capacitor

every time the chip turns off (Vcc < UVLO, LINE < 1.24 V or > 6 V, DIS > 1.85 V, ISEN > 1.5

V, DELAY > 2 V) to make sure it is soft-started next, and when the voltage on the current

sense pin (ISEN) exceeds 0.8 V, as long as it stays above 0.75 V.

Delayed shutdown upon overcurrent. A capacitor and a resistor are connected from this pin

to GND to set the maximum duration of an overcurrent condition before the IC stops

switching and the delay after which the IC restarts switching. Every time the voltage on the

ISEN pin exceeds 0.8 V, the capacitor is charged by an internal 150 µA current generator

and is slowly discharged by the external resistor. If the voltage on the pin reaches 2 V, the

soft-start capacitor is completely discharged so that the switching frequency is pushed to its

maximum value and the 150 µA is kept always on. As the voltage on the pin exceeds 3.5 V

the IC stops switching and the internal generator is turned off, so that the voltage on the pin

decays because of the external resistor. The IC is soft-restarted as the voltage drops below

0.3 V. In this way, under short-circuit conditions, the converter works intermittently with very

low input average power.

Timing capacitor. A capacitor connected from this pin to GND is charged and discharged by

internal current generators programmed by the external network connected to pin 4 (RFmin)

and determines the switching frequency of the converter.

Minimum oscillator frequency setting. This pin provides a precise 2 V reference and a

resistor connected from this pin to GND defines a current that is used to set the minimum

oscillator frequency. To close the feedback loop that regulates the converter output voltage

by modulating the oscillator frequency, the phototransistor of an optocoupler is connected to

this pin through a resistor. The value of this resistor sets the maximum operating frequency.

An R-C series connected from this pin to GND sets frequency shift at startup to prevent

excessive energy inrush (soft-start).

Css

DELAY

RFmin

DocID15534 Rev 8

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L6599ATDTR Related Products

	L6599ATDTR	L6599ATD
Description	AC to DC Switching Converter Resonant Controller 500kHz T/R 16-Pin SO N	AC to DC Switching Converter Resonant Controller 500kHz Tube 16-Pin SO N
EU restricts the use of certain hazardous substances	Compliant	Compliant
ECCN (US)	EAR99	EAR99
Part Status	Active	Active
HTS	8542.39.00.01	8542.31.00.01
Topology	Resonant Controller	Resonant Controller
Minimum Supply Voltage (V)	8.85	8.85
Maximum Supply Voltage (V)	16	16
Maximum Operating Current (mA)	5	5
Switching Frequency (kHz)	500	500
Soft Start Option	Yes	Yes
Minimum Operating Temperature (°C)	-40	-40
Maximum Operating Temperature (°C)	150	150
Packaging	Tape and Reel	Tube
Standard Package Name	SOP	SOP
Pin Count	16	16
Supplier Package	SO N	SO N
Mounting	Surface Mount	Surface Mount
Package Height	1.6(Max)	1.6(Max)
Package Length	10(Max)	10(Max)
Package Width	4(Max)	4(Max)
PCB changed	16	16
Lead Shape	Gull-wing	Gull-wing

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