原标题：Microchip HV9961+PIC16F15313恒流控制LED驱动器解决方案

　　Microchip公司的HV9961是平均电流模式恒流控制LED驱动器集成电路,工作在恒定关断时间模式.和HV9910B不同,该器件不会出现峰值到平均值误差.这就大大改善精度和LED电流的输入电压和负载调整率,不需要回路补偿或高边电流检测输出LED电流精确度为±3%. HV9961工作电压为8V-450V,具有PWM调光,输入为外部控制的TTL兼容信号.此外,输出电流可进行编程.工作温度-40℃ 到 125℃.主要用在DC/DC或AC/DC LED驱动器,LCD显示器的LED背景光驱动器,通用恒流源,LED标语和显示,建筑物和装饰LED照明以及LED街灯照明.中电网为您整理如下详细资料,本文介绍了HV9961主要特性,功能框图和典型应用电路图,全特性8/14引脚MCU PIC16(L)F15313/23主要特性,框图以及蓝牙白光-彩色-混合LED驱动器参考设计主要特性,框图,LED驱动板和LED负载板的电路图和材料清单,PCB设计图.

　　The HV9961 is an Average-Current mode constant-current control LED driver IC operating in a constant Off-time mode. Unlike the HV9910B, this control IC does not produce a peak-to-average error. This greatly improves accuracy as well as the line and load regulations of the LED current without any need for loop compensation or high-side current sensing. Its output LED current accuracy is ±3%.

　　The IC is equipped with a current limit comparator for Hiccup mode output short-circuit protection.

　　The HV9961 can be powered from an 8V–450V supply. It has a PWM dimming input that accepts an external control TTL-compatible signal. In addition, the output current can be programmed by an internal 275 mV reference or controlled externally through a 0V–1.5V linear dimming input.

　　The HV9961 is pin-to-pin compatible with HV9910B, and it can be used as a drop-in replacement for many applications to improve LED current accuracy and regulation.

　　HV9961主要特性:

　　•Fast Average Current Control

　　•Programmable Constant Off-time Switching

　　•Linear Dimming Input

　　•PWM Dimming Input

　　•Output Short-circuit Protection with Skip Mode

　　• -40°C to 125°C Ambient Operating Temperature

　　•Pin-compatible with HV9910B

　　HV9961应用:

　　•DC/DC or AC/DC LED Driver Applications

　　•LED Backlight Driver for LCD Displays

　　•General Purpose Constant-current Source

　　•LED Signage and Displays

　　•Architectural and Decorative LED Lighting

　　•LED Street Lighting

　　图1. HV9961功能框图

　　图2. HV9961典型应用电路图

　　全特性8/14引脚MCU PIC16(L)F15313/23

　　PIC16(L)F15313/23 microcontrollers feature Analog, Core Independent Peripherals and Communication Peripherals, combined with eXtreme Low-Power (XLP) technology for a wide range of general purpose and low-power applications.

　　The devices feature multiple PWMs, multiple communication, temperature sensor, and memory features like Memory Access Partition (MAP) to support customers in data protection and bootloader applications, and Device Information Area (DIA) which stores factory calibration values to help improve temperature sensor accuracy.

　　PIC16(L)F15313/23核主要特性:

　　• C Compiler Optimized RISC Architecture

　　• Operating Speed:

　　- DC – 32 MHz clock input

　　- 125 ns minimum instruction cycle

　　• Interrupt Capability

　　• 16-Level Deep Hardware Stack

　　• Timers:

　　- 8-bit Timer2 with Hardware Limit Timer (HLT)

　　- 16-bit Timer0/1

　　• Low-Current Power-on Reset (POR)

　　• Configurable Power-up Timer (PWRTE)

　　• Brown-out Reset (BOR)

　　• Low-Power BOR (LPBOR) Option

　　• Windowed Watchdog Timer (WWDT):

　　- Variable prescaler selection

　　- Variable window size selection

　　- All sources configurable in hardware or software

　　• Programmable Code Protection Memory

　　• 3.5 KB Flash Program Memory

　　• 256 Bytes Data SRAM

　　• Direct, Indirect and Relative Addressing modes

　　• Memory Access Partition (MAP):

　　- Write protect

　　- Customizable Partition

　　• Device Information Area (DIA)

　　• Device Configuration Information (DCI)

　　Operating Characteristics

　　• Operating Voltage Range:

　　- 1.8V to 3.6V (PIC16LF15313/23)

　　- 2.3V to 5.5V (PIC16F15313/23)

　　• Temperature Range:

　　- Industrial: -40℃ to 85℃

　　- Extended: -40℃ to 125℃

　　Power-Saving Functionality

　　• DOZE mode: Ability to Run the CPU Core Slower than the System Clock

　　• IDLE mode: Ability to halt CPU Core while Internal Peripherals Continue Operating

　　• SLEEP mode: Lowest Power Consumption

　　• Peripheral Module Disable (PMD):

　　- Ability to disable hardware module to minimize active power consumption of unused peripherals

　　eXtreme Low-Power (XLP) Features

　　• Sleep mode: 50 nA @ 1.8V, typical

　　• Watchdog Timer: 500 nA @ 1.8V, typical

　　• Operating Current:

　　- 8uA @ 32 kHz, 1.8V, typical

　　- 32 A/MHz @ 1.8V, typical

　　Digital Peripherals

　　• Four Configurable Logic Cells (CLC):

　　- Integrated combinational and sequential logic

　　• Complementary Waveform Generator (CWG):

　　- Rising and falling edge dead-band control

　　- Full-bridge, half-bridge, 1-channel drive

　　- Multiple signal sources

　　• Two Capture/Compare/PWM (CCP) module:

　　- 16-bit resolution for Capture/Compare modes

　　- 10-bit resolution for PWM mode

　　• Four 10-Bit PWMs

　　• Numerically Controlled Oscillator (NCO):

　　- Generates true linear frequency control and increased frequency resolution

　　- Input Clock: 0 Hz < FNCO < 32 MHz

　　- Resolution: FNCO/220

　　• One EUSART, RS-232, RS-485, LIN compatible Digital Peripherals (Cont.)

　　• I/O Pins:

　　- Individually programmable pull-ups

　　- Slew rate control

　　- Interrupt-on-change with edge-select

　　- Input level selection control (ST or TTL)

　　- Digital open-drain enable

　　• Peripheral Pin Select (PPS):

　　- Enables pin mapping of digital I/O

　　Analog Peripherals

　　• Analog-to-Digital Converter (ADC):

　　- 10-bit with up to 43 external channels

　　- Operates in Sleep

　　• Up to two Comparators:

　　- FVR, DAC and external input pin available on inverting and noninverting input

　　- Software selectable hysteresis

　　- Outputs available internally to other modules, or externally through PPS

　　• 5-Bit Digital-to-Analog Converter (DAC):

　　- 5-bit resolution, rail-to-rail

　　- Positive Reference Selection

　　- Unbuffered I/O pin output

　　- Internal connections to ADCs and comparators

　　• Voltage Reference:

　　- Fixed Voltage Reference with 1.024V, 2.048V and 4.096V output levels

　　• Zero-Cross Detect module:

　　- AC high voltage zero-crossing detection for simplifying TRIAC control

　　- Synchronized switching control and timing

　　Flexible Oscillator Structure

　　• High-Precision Internal Oscillator:

　　- Software selectable frequency range up to 32 MHz, ±1% typical

　　• x2/x4 PLL with Internal and External Sources

　　• Low-Power Internal 31 kHz Oscillator (LFINTOSC)

　　• External Oscillator Block with:

　　- Three crystal/resonator modes up to 20 MHz

　　- Three external clock modes up to 32 MHz

　　• Fail-Safe Clock Monitor:

　　- Allows for safe shutdown if primary clock stops

　　• Oscillator Start-up Timer (OST):

　　- Ensures stability of crystal oscillator Resources

　　图3. PIC16(L)F15313/23框图

　　图4. PIC16(L)F15323框图

　　图5. 简化PIC MCU时钟源框图

　　蓝牙白光-彩色-混合LED驱动器参考设计

　　The Bluetooth White-Color-Mix LED Driver Reference Design is a Total System Solution (TSS) that demonstrates how to drive two different temperature color LED strings and how to control the desired color through a Bluetooth communication interface.

　　图6. LED驱动器参考设计框图

　　LED驱动器参考设计主要特性:

　　The important features of the Bluetooth White-Color-Mix LED Driver Reference Design

　　include:

　　• The reference design combines a basic buck LED driver (HV9961) with an 8-bit

　　PIC16F15313 microcontroller, which communicate through UART with the BLE module RN4871 to create a Microchip Intelligent LED Lighting TSS Solution.

　　• The microcontroller and the BLE module are supplied directly from the 120 VAC 60 Hz or 230 VAC 50 Hz, by means of a bridge rectifier and a Depletion Field-Effect Transistor (DN2470), followed by a usual 3V3 Low-Dropout (LDO) regulator MCP1703. The Bluetooth White-Color-Mix LED Driver can be supplied from a wide input voltage range, from 50 to 265VAC.

　　• The Bluetooth White-Color-Mix LED Driver offers an implementation of a passive Power Factor Correction (PFC). It provides a PFC of at least 0.9 at 120 VAC and 0.85 at 230 VAC.

　　• The PIC16F15313 microcontroller receives the data from the Bluetooth module and controls the color Temperature and the intensity of the LED load by means of a 2 PWM output and two auxiliary FETs, according to the values which were set by the user in the mobile Android application.

　　• At the same time, the microcontroller performs a memory function by retaining the last set values in the flash memory to be used as default values at power on.

　　• The Bluetooth White-Color-Mix LED Driver uses the RN4871 Bluetooth Low Energy (BLE) module which integrates Bluetooth 4.2 baseband controller, on-board Bluetooth stack, digital and analog I/O, and RF power amplifier into one solution.

　　• Bluetooth low energy takes a different direction. Instead of increasing the data rates available, it has been optimized for ultra-low power consumption

　　The Bluetooth White-Color-Mix LED Driver Reference Design kit includes:

　　• LED Driver Board ARD00922

　　• LED Load Board INT00923

　　• Important Information Sheet