參數(shù)資料
型號： L6591TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, PDSO16
封裝： ROHS COMPLIANT, SOP-16
文件頁數(shù)： 23/32頁
文件大?。?/td> 560K
代理商： L6591TR
L6591
Description
Doc ID 14821 Rev 4
3/32
1
Description
The L6591 is a double-ended PWM controller specific for the soft-switched half-bridge
topology. It provides complementary PWM control, where the high-side switch is driven ON
for a duty cycle D and the low-side switch for a duty cycle 1-D, with D < 50%. An externally
programmable dead-time inserted between the turn-off of one switch and the turn-on of the
other one 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 of the converter by means of an
externally programmable oscillator: the maximum duty cycle is digitally clipped at 50% by a
T-flip-flop, so that the operating frequency will be half that of the oscillator.
At very light load the IC enters a controlled burst-mode operation that, along with the built-in
non-dissipative high-voltage start-up circuit and the low quiescent current, helps keep low
the consumption from the mains and be compliant with energy saving recommendations.
To allow compliance with these standards in two-stage power-factor-corrected systems as
well, an interface with the PFC controller is provided that enables to switch off the pre-
regulator between one burst and the following one.
An innovative adaptive UVLO helps minimize the issues related to the fluctuations of the
self-supply voltage with the output load, due to transformer's parasitic.
IC's protection functions include: not-latched input undervoltage (brownout), a first-level
OCP with delayed shutdown able to protect the system during overload and short circuit
conditions (either auto-restart or latch mode can be selected) and a second-level OCP that
latches off the IC when the transformer saturates or one of the secondary diodes fails short.
Finally, a latched disable function allows easy implementation of OTP or OVP.
Programmable soft-start and digital leading-edge blanking on current sense input pin
complete the equipment of the IC.
Figure 2.
Typical system block diagram
Vinac
Voutd c
L6561/2
or
L6563
PW M is turned off in case of PFC's
anomalous oper ation, for safety
PFC can be turned off at light
load to ease compliance with
energy saving r egulations.
L6591
PFC PRE-REGULATOR
ZVS HALF-BRIDGE
Vinac
Voutd c
L6561/2
or
L6563
PW M is turned off in case of PFC's
anomalous oper ation, for safety
PFC can be turned off at light
load to ease compliance with
energy saving r egulations.
L6591
PFC PRE-REGULATOR
ZVS HALF-BRIDGE
相關PDF資料
PDF描述
L6599AN SWITCHING CONTROLLER, DIP16
L6599ATDTR SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6599D 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6599N 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP16
L6599TR 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
相關代理商/技術(shù)參數(shù)
參數(shù)描述
L6598 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
L6598_04 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE RESONANT CONTROLLER
L6598D 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
L6598D013TR 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
L6598D016TR 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High voltage resonant controller
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