2024年8月31日发(作者：戈璧)
HoltekHT7A4016 非隔离式 DC 电源解决方案
LED TV 的 LED 背光照明.本文介绍了 HT7A4016 主要特性,方框图以及针
对各种不同应用电路的参考设计电路.The HT7A4016 is a controller IC that
includes the necessary features to implement off-line or DC-DC current mode control
schemes with a minimal external parts count. Internal circuits include a specially
designed Mixed-Mode/Analog Interface for multi-function and multi-topology
control schemes (DC-DC Buck/Boost, Off-line AC-DC), a trimmed oscillator for
precise duty-cycle control under voltage lockout with a start-up current of less than
0.5mA, a wide temperature range, precise voltage reference, internal Slope
Compensation and Leading-Edge Blanking. The HT7A4016 features basic system
protection functions such as Cycle-by-Cycle Current Limiting and Under Voltage
Lock-Out (UVLO). A Multi-Function Pin can be used as a dimming function for
LED driving, and as a primary feedback control f o r Primary - Side Feed back AC -
DC 7A4016 主要特性:• High Performance, Low Cost Current Mode
PWM Controller especially designed for Energy Star 2.0• Very Low Startup Current
(20μA) and Operating Current• High-Voltage CMOS Process with Excellent ESD
protection (3KV)• ±5% Trimmed Oscillator for Precise Frequency Control• LEB
(Leading-Edge Blanking) on CS Pin• Internal Slope Compensation• Programmable
Switching Frequency• Internally Trimmed Reference with UVLO (Under Voltage
Lockout)• Cycle-by-Cycle Current LimitingHT7A4016 应用:• Switching AC-DC
Adaptors• DC-DC Switching Buck/Boost Converters• LED Backlights for LCD/LED
TVs 图 1. HT7A4016 方框图图 2. HT7A4016 典型应用电路图图 3. HT7A4016 恒
压升压应用电路图(DC/DC 升压)图 4. HT7A4016 用于背光 LED 驱动的 DC/DC
2024年8月31日发(作者：戈璧)
HoltekHT7A4016 非隔离式 DC 电源解决方案
LED TV 的 LED 背光照明.本文介绍了 HT7A4016 主要特性,方框图以及针
对各种不同应用电路的参考设计电路.The HT7A4016 is a controller IC that
includes the necessary features to implement off-line or DC-DC current mode control
schemes with a minimal external parts count. Internal circuits include a specially
designed Mixed-Mode/Analog Interface for multi-function and multi-topology
control schemes (DC-DC Buck/Boost, Off-line AC-DC), a trimmed oscillator for
precise duty-cycle control under voltage lockout with a start-up current of less than
0.5mA, a wide temperature range, precise voltage reference, internal Slope
Compensation and Leading-Edge Blanking. The HT7A4016 features basic system
protection functions such as Cycle-by-Cycle Current Limiting and Under Voltage
Lock-Out (UVLO). A Multi-Function Pin can be used as a dimming function for
LED driving, and as a primary feedback control f o r Primary - Side Feed back AC -
DC 7A4016 主要特性:• High Performance, Low Cost Current Mode
PWM Controller especially designed for Energy Star 2.0• Very Low Startup Current
(20μA) and Operating Current• High-Voltage CMOS Process with Excellent ESD
protection (3KV)• ±5% Trimmed Oscillator for Precise Frequency Control• LEB
(Leading-Edge Blanking) on CS Pin• Internal Slope Compensation• Programmable
Switching Frequency• Internally Trimmed Reference with UVLO (Under Voltage
Lockout)• Cycle-by-Cycle Current LimitingHT7A4016 应用:• Switching AC-DC
Adaptors• DC-DC Switching Buck/Boost Converters• LED Backlights for LCD/LED
TVs 图 1. HT7A4016 方框图图 2. HT7A4016 典型应用电路图图 3. HT7A4016 恒
压升压应用电路图(DC/DC 升压)图 4. HT7A4016 用于背光 LED 驱动的 DC/DC