L6591

批量生产
Design Win

非对称半桥转换器拓扑的电流模式PWM控制器

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产品概述

描述

The L6591 is a double-ended PWM controller specific to 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 deadtime 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 user 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 is 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 startup circuit and the low quiescent current, helps keep the consumption from the mains low and is compliant with energy saving recommendations.

To allow compliance with these standards also in two-stage power-factor-corrected systems, an interface with the PFC controller is provided that enables the pre-regulator to be switched off between one burst and the following one.

An innovative adaptive UVLO helps minimize the issues related to fluctuations of the self-supply voltage with the output load, due to the transformer's parasitic.

IC 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 the current sense input pin complete the equipment of the IC.

  • 所有功能

    • Complementary PWM control for soft-switched half bridge with programmable deadtime
    • Up to 500 kHz operating frequency
    • Onboard high-voltage startup
    • Advanced light load management
    • Adaptive UVLO
    • Pulse-by-pulse OCP
    • OLP (latched or autorestart)
    • Transformer saturation detection
    • Interface with PFC controller
    • Latched disable input
    • Input for power-on sequencing or brownout protection
    • Programmable soft-start
    • 4% precision external reference
    • 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dV/dt immunity
    • SO16N package

电路原理图

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EDA符号、封装和3D模型

STMicroelectronics - L6591

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质量与可靠性

产品型号 Marketing Status 等级规格 符合RoHS级别 材料声明**
L6591
批量生产
SO-16 工业 Ecopack2
L6591TR
批量生产
SO-16 工业 Ecopack2

L6591

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6591TR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

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产品型号
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包装类型
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ECCN (US)
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L6591TR
Available at distributors

经销商的可用性 L6591TR

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L6591
Available at distributors

经销商的可用性 L6591

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

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L6591TR 批量生产

Budgetary Price (US$)*/Qty:
-
包:
包装类型:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

产品型号:

L6591TR

代理商名称

代理商库存报告日期:

L6591 批量生产

Budgetary Price (US$)*/Qty:
-
包:
包装类型:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

产品型号:

L6591

代理商名称

代理商库存报告日期:

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(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商