Microchip发布直流无刷控制器手册：功能与应用详解

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Microchip Technology Inc.在2013年发布了一款全新的直流无刷控制器数据手册（DS20005228A），这是一份专注于高性能电机控制的解决方案。该控制器集成了三个半桥驱动器，分别负责驱动外部的高侧NMOS和低侧NMOS场效应管，这使得它具有高度灵活性和精确性。每个驱动器都具备独立的输入控制，支持高达0.5A的峰值输出电流，确保了在12V电源下稳健工作。控制器的关键特性包括： 1. 驱动能力：通过半桥架构，可以控制电机的高侧和低侧，确保精确的电流控制。 2. 保护功能：内置过电流和短路保护机制，确保系统安全运行。 3. 电压管理：集成一个可调的输出 buck 降压稳压器，提供750mW的功率，并配备固定输出线性稳压器，如5V和12V，分别支持20mA的电流。 4. 基准和监测：内部集成的带隙参考电路用于稳定电压，同时配备了三个运放用于电机相位电流检测和位置传感。 5. 保护限制：设定有6V的欠电压锁定（UVLO）和28V的过电压锁定（OVLO）保护，以及100ms瞬态电压耐受高达48V。 6. 温度适应性：适用于宽温范围，从-40°C至+150°C，确保在极端环境下仍能稳定工作。 7. 安全特性：具有热关断功能，防止过热。这款控制器适用于各种应用领域，如汽车的燃油、水、通风系统电机，家用电器，以及永磁同步电机（PMSM）的控制，特别适合于 Hobby 航空器、船只和车辆等高性能设备。为了帮助用户更好地理解和应用这一技术，Microchip还提供了相关的技术文档支持，例如AN885，关于BLDC电机基础知识，以及AN1160，关于无传感器BLDC控制的技术指南，这两份文档是深入学习和设计实践的重要参考资料。通过整合这些资源，工程师们可以充分利用DS20005228A控制器的强大功能，提升直流无刷电机控制系统的性能和可靠性。

MCP8024

DS20005228A-page 8  2013 Microchip Technology Inc.

Output Driver Source Current I

SOURCE

0.3 — — A V

= 12V, H[A:C], L[A:C]

Output Driver Sink Current I

SINK

0.3 — — A V

= 12V, H[A:C], L[A:C]

Output Driver Source

Resistance

DSON

—17— Ω I

OUT

= 10 mA, V

= 12V,

H[A:C], L[A:C]

Output Driver Sink Resistance R

DSON

—17— Ω I

OUT

= 10 mA, V

= 12V,

H[A:C], L[A:C]

Output Driver UVLO

Threshold

UVLO

7.2 8.0 — V

Output Driver Bootstrap

Voltage (w/ respect to ground)

BOOTSTRAP

—

V Continuous

< 100 ms

Output Driver HS Drive

Voltage

8.0

-5.5

—

13.5

—

V With respect to Phase pin

With respect to ground

Output Driver LS Drive

Voltage

8.0 12 13.5 V With respect to ground

Output Driver Phase Pin

Voltage

PHASE

-5.5V — 34 V With respect to ground

Output Driver Short Circuit

Protection Threshold

—

0.250

0.500

0.750

1.000

—

V Set by DE2 CONFIG[1:0] word

00 - Default

Output Driver Short Circuit

Detected Propagation Delay

SC_DEL

—

430

—

ns C

LOAD

= 1000 pF, V

=12V,

detection after blanking

detection during blanking, value

is delay after blanking

Output Driver Turn-off

Propagation Delay

DEL_OFF

— 100 250 ns C

LOAD

= 1000 pF, V

=12V,

Output Driver Turn-on

Propagation Delay

DEL_ON

— 100 250 ns C

LOAD

= 1000 pF, V

=12V,

Standby to Motor Operational

LOAD

= 10 µF)

CE Low to Standby State

CE Fault Clearing Pulse

MOTOR

STANDBY

FAULT_CLR

—

µs

CE High-Low-High Transition <

100 µs (Fault Clearing)

Standby state to Operational state

Time after CE = 0V

CE High-Low-High Transition

Time

Current Sense Amplifier

Input Offset Voltage V

-3.0 — +3.0 mV V

= 0V

= -40°C to +150°C

Input Offset Temperature Drift V

/T

— 2.0 — V/°C V

= 0V

Input Bias Current I

-1 — +1 µA

Common Mode Input Range V

CMR

-0.3 — 3.5 V

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted T

= -40°C to +150°C.

Parameters Symbol Min. Typ. Max. Units Conditions

Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable

junction temperature and the thermal resistance from junction to air (i.e., T

, T

, 

). Exceeding the

maximum allowable power dissipation may cause the device operating junction temperature to exceed the

maximum 160°C rating. Sustained junction temperatures above 150°C can impact the device reliability

and OTP data retention.

2: 1000 hour cumulative maximum for OTP data retention (typical).

 2013 Microchip Technology Inc. DS20005228A-page 9

MCP8024

Common Mode Rejection Ratio CMRR 65 80 — dB Freq = 1 kHz, I

OUT

= 10 µA

Maximum Output Voltage

Swing

, V

0.05 — 4.5 V I

OUT

= 200 µA

Slew Rate SR — 7—V/sSymmetrical

Gain Bandwidth Product GBWP — 10.0 — MHz

Current Comparator

Hysteresis

HYS

—10—mV

Current Comparator Common

Mode Input Range

CC_CMR

1.0 — 4.5 V

Current Limit DAC

Resolution — 8 — Bits

Output Voltage Range V

, V

0.991 — 4.503 V I

OUT

= 1 mA

Output Voltage V

DAC

—

0.991

1.872

4.503

—

V Code * 13.77 mV/Bit + 0.991V

Code 00H

Code 40H

Code FFH

Input to Output Delay T

DELAY

— 50 — µs 5 time constants of 100 kHz filter

Integral Nonlinearity INL -0.5 — +0.5 %FSR %Full Scale Range

Differential Nonlinearity DNL -50 — +50 %LSB %LSB

ILIMIT_OUT Sink Current

(Open-Drain)

OUT

—1—mAV

ILIMIT_OUT

<= 50mV

Voltage Level Translator

High-Voltage Input Range VIN 0 — VDD V

Low-Voltage Output Range VOUT 0 — 5.0V V

Input Pull-up Resistor RPU 20 30 47 kΩ

High-Level Input Voltage VIH 0.60 — — V

= 15V

Low-Level Input Voltage VIL — — 0.40 V

= 15V

Input Hysteresis VHYS — — 0.30 V

Propagation Delay TLV_OUT — 3.0 6.0 µs

Maximum Communication

Frequency

FMAX — — 20 kHz

Low-Voltage Output Sink

Current (Open-Drain)

IOL — 1 — mA V

OUT

<= 50 mV

OTP Data Retention

OTP Cell High Temperature

Operating Life

HTOL — 1000 — Hours T

= 150°C (Note 2)

OTP Cell Operating Life — 10 — Years T

= 85°C

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted T

= -40°C to +150°C.

Parameters Symbol Min. Typ. Max. Units Conditions

Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable

junction temperature and the thermal resistance from junction to air (i.e., T

, T

, 

). Exceeding the

maximum allowable power dissipation may cause the device operating junction temperature to exceed the

maximum 160°C rating. Sustained junction temperatures above 150°C can impact the device reliability

and OTP data retention.

2: 1000 hour cumulative maximum for OTP data retention (typical).

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