Datasheet > A4941GLPTR-T

A4941GLPTR-T

更新时间： 2024-01-03 10:58:40

品牌	Logo	应用领域
急速微 - ALLEGRO		电动机控制光电二极管
页数	文件大小	规格书
9页	226K
描述
AC Motor Controller, NMOS, PDSO16, LEAD FREE, MO-153ABT, TSSOP-16

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A4941GLPTR-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Not Recommended	零件包装代码：	TSSOP
包装说明：	TSSOP, TSSOP16,.25	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	7.83
模拟集成电路 - 其他类型：	AC MOTOR CONTROLLER	JESD-30 代码：	R-PDSO-G16
JESD-609代码：	e3	长度：	5 mm
湿度敏感等级：	2	功能数量：	1
端子数量：	16	最高工作温度：	105 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装等效代码：	TSSOP16,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	电源：	12 V
认证状态：	Not Qualified	座面最大高度：	1.2 mm
子类别：	Motion Control Electronics	最大供电电流 (Isup)：	5 mA
最大供电电压 (Vsup)：	16 V	最小供电电压 (Vsup)：	5 V
标称供电电压 (Vsup)：	12 V	表面贴装：	YES
技术：	NMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	4.4 mm
Base Number Matches：	1

A4941GLPTR-T 数据手册

A4941

Three-Phase Sensorless Fan Driver

Application Information

Name

Typical Value

Description

CTAP

OUTB

VBB supply capacitor, minimum 10 μF,

electrolytic can be used

10 μF / 25 V

0.1 μF / 25 V

10 kΩ

OUTC

CP1

A4941

PAD

OUTA

SENSE

VBB

C2,C3

Charge pump ceramic capacitors

CP2

FG pull-up resistor, can be pulled-up to

VCP

GND

SLEW

PWM

V_BBif required

CTAP

GND

CTAP

Optional blocking diode for supply reverse

polarity protection

>1.5 A rated

15 V

TEST

Transient voltage suppressor (TVS)

Current limiting sense resistor, required for

low resistance motors

0.167 Ω

Typical Application Circuit; speed adjusted via VBB

Absolute Maximum table, then simply connect the SENSE pin to

ground. That is:

Startup Oscillator Setting (FC)

Typically, the 50 ms setting is optimum for motors appropriate

for use with the A4941. If the motor does not produce a proper

BEMF signal at startup when power is applied, a longer setting

may be required.

• If (V_BB(max) / R_motor) < 1.25 A, eliminate R_S.

• If (V_BB(max) / R_motor) > I_OUT(max), the choice of R_Sdeter-

mines the current limit setting; recommended range is

167 mΩ < R_S< 250 mΩ.

SLEW Setting

Connect SLEW to ground to enable the soft switching func-

tion. For some motors, soft switching may reduce audible noise.

Enabling the soft switching function can result in motor stall for

some motors, specifically motors with large inductance that run at

higher speeds. For this situation, there are two potential solutions:

Note: For some motor types, use of the current limit circuit may

prevent proper startup due to the effect of the chopping on the

BEMF voltage appearing on the tri-stated winding.

Layout Notes

• Connect GND pins (5,11) to exposed pad ground area under

package.

• Limit the motor speed by lowering the maximum demand, by

reducing either V_motor(max) or the PWM duty applied.

• Disable soft switching by leaving SLEW pin open circuit.

• Add thermal vias from exposed pad to bottom side ground

plane.

Current Limiting

• Place V_BBdecoupling capacitor as close to the IC as possible.

• Place sense resistor, (if used), as close to the IC as possible.

Use of the current limit circuit is not required. If motor resistance

(phase-to-phase) will limit the current below the rating in the

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1...4 5 678 9

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