概述
数据手册A277 概述
COMPLEMENTARY OUTPUT HALL EFFECT LATCHED SINK DRIVER 互补输出霍尔效应锁存灌电流驱动器
A277 数据手册
通过下载A277数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。
PDF下载Ampson Technology, Inc.
A277
COMPLEMENTARY OUTPUT HALL EFFECT
LATCHED SINK DRIVER
FEATURES
ꢀ
ꢀ
On-chip Hall sensor with two different sensitivity and hysteresis settings for A277.
Internal bandgap regulator allows temperature compensated operations and a wide
operating voltage range.
ꢀ
ꢀ
ꢀ
ꢀ
High output sinking capability up to 400mA for driving large load.
Lower current change rate reduces the peak output voltages during switching.
Build in protection diode for chip reverse power connecting.
Available in die form or rugged low profile 4 pin SIP packages.
GENERAL DESCRIPTION
A277 are integrated Hall sensors with output drivers designed for electronic commutation
of brushless DC motor applications. The device includes an on-chip Hall voltage generator
for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to
provide switching hysteresis for noise rejection, and complementary open-collector drivers
for sinking large current loads. An internal bandgap regulator is used to provide
temperature compensated supply voltage for internal circuits and allows a wide operating
supply range.
If a magnetic flux density larger than threshold Bop, DO is turned on(low) and DOB is
turned off (high). The output state is held until a magnetic flux density reversal falls below
Brp causing DO to be turned off and DOB turned on.
A277 are rated for operation over temperature range from -20 oC to 85 oC and voltage
range from 3.5V to 20V. The devices are available in low cost die forms or rugged 4 pin
SIP packages.
1/6
12/26/2001 REV.1.0
Ampson Technology, Inc.
A277
APPLICATIONS
ꢀ Brushless DC Motor
ꢀ Brushless DC Fan
ꢀ Revolution Counting
ꢀ Speed Measurement
FUNCTIONAL BLOCK DIAGRAM
VCC
1
2
3
OUTPUT(DO)
REG.
HALL
SENSOR
OUTPUT(DOB)
4
VSS
PIN DESCRIPTION
1 : VCC
2 : DO
277
XXX
3 : D0B
4 : VSS
1
2 3
4
REMARK : XXX : DATE CODE ( ex : 52Z )
52 : WEEK ( ex=>52:52 WEEK . 35:35 WEEK )
Z : YEAR ( ex=>Z:DC2001 , Y:DC2002 , X:DC2003 )
Name
P/I/O
P
Pin #
Description
Positive Power Supply
Output Pin
Vcc
1
2
3
4
DO
DOB
Vss
O
O
P
Output Pin
Ground
2/6
12/26/2001 REV.1.0
Ampson Technology, Inc.
A277
ABSOLUTE MAXIMUM RATING ( at Ta=25 oC )
Supply Voltage, Vcc--------------------------------- 20V
Reverse VCC Polarity Voltage, VRCC-------------- -35V
Magnetic flux density, B ---------------------------- Unlimited
Output OFF Voltage, Vce -------------------------- 50V(Note 1)
Output ON Current, Ic
Continuous -------------------------------- 400mA
Hold-------- --------------------------------- 500mA
Peak (Start Up) --------------------------- 700mA
Operating Temperature Range,
Ta -------------------------------------------- (-20 oC to +85 oC)
Storage Temperature Range,
Ts--------------------------------------------- (-65 oC to +150 oC)
Package Power Dissipation,
Pd-------------------------------------------- 500mW
Maximum Junction Temp , Tj----------------------- 175 oC
(Note1) Output Zener protection voltage.
ELECTRICAL CHARACTERISTICS ( Ta =+25 oC , Vcc=4.0V to 20V )
Characteristic
Low Supply Voltage
Supply Voltage
Symbol
Vce
Conditions
Vcc=3.5V, IL=100mA
—
Min Typ Max Units
—
3.5
—
0.4
—
—
V
V
Vcc
20
Output Saturation Voltage Vce(sat) Vcc=14V, IL=300mA
300 600 mV
Output Leakage Current
Supply Current
Icex
Icc
Vce=14V, Vcc=14V
Vcc=20V, Output Open
Vcc=14V, RL=820Ω,
CL=20pF
Vcc=14V, RL=820Ω,
CL=20pF
—
< 0.1
13
10
20
uA
mA
—
Output Rise Time
tr
—
—
—
3.0
0.3
3.0
10
1.5
10
us
us
us
Output Falling Time
Switch Time Differential
tf
Vcc=14V, RL=820Ω,
CL=20pF
∆t
3/6
12/26/2001 REV.1.0
Ampson Technology, Inc.
A277
MAGNETIC CHARACTERISTICS
Ta=+25 oC
Ta=0 oC to 70 oC
Characteristic
Symbol
Units
Min
Max
70
Min
Max
Bop
Brp
0
0
70
G
G
G
Operate Point
Release Point
Hysteresis
-70
40
0
-70
20
0
Bhys
110
140
TEST CIRCUIT
14V
Vout1(DO)
RL1
Vout2(DOB)
RL2
CL2
CL1
RL1=RL2=820 Ohm
CL1=CL2=20 pF
4/6
12/26/2001 REV.1.0
Ampson Technology, Inc.
A277
HYSTERESIS CHARACTERISTICS
A277
DOB
DO
12
12
RP
OFF
OFF
OP
10
8
10
8
6
6
4
4
2
2
ON
OP
RP
ON
-200
-100
0
100
200
-200
-100
0
100
200
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
Power Dissipation VS. Environment Temperature
Ta (oC)
Pd (mW) 550 525 515 505 485 475 465 455 445 425 405 385 365
25 50 60 70 80 85 90 95 100 105 110 115 120
Pow er Dissipation Curve
Pd (m W )
600
500
400
300
200
100
0
25
50
75
100
125
150
Ta (ºC)
Note：TO92 4 pin (SIP-4L) package.
5/6
12/26/2001 REV.1.0
Ampson Technology, Inc.
A277
PACKAGE INFORMATION
Active Area Depth
Package Sensor Location
1.96mm
Top
1.482mm
View
Top
Marking
View
Site
2
1
3
4
0.7mm
PACKAGE DIMENSION
5o -7o
14.25mm
+/-1.25mm
1.55mm
+/-0.1mm
0.38mm
+/-0.03mm
0.85mm
+/-0.1mm
3o -5o
3.65mm
0.30mm
+/-0.1mm
+/-0.1mm
0.46mm
0.38mm
+/-0.03mm
+/-0.03mm
Marking
Site
1.27mm
+/-0.03mm
5o -7o
3o -5o
REMARK: XXX(DATE CODE)
6/6
12/26/2001 REV.1.0
A277 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| A2774B-SYG-S530-E2 | EVERLIGHT | 3mm 1Pcs Circuit Board Indicator | 获取价格 |
|
| A2774B-UBC-C470 | EVERLIGHT | 3.0mm Round Type LED Lamps | 获取价格 |
|
| A2774B/SYG/S530-E2 | EVERLIGHT | 3mm 1Pcs Circuit Board Indicator | 获取价格 |
|
| A2774B/UBC/C470 | EVERLIGHT | 3.0mm Round Type LED Lamps | 获取价格 |
|
| A277D | ETC | Interface IC | 获取价格 |
|
| A278308 | AMICC | 256K X 8 OTP CMOS EPROM | 获取价格 |
|
| A278308-70 | AMICC | 256K X 8 OTP CMOS EPROM | 获取价格 |
|
| A278308A | AMICC | 256K X 8 OTP CMOS EPROM | 获取价格 |
|
| A278308A-55 | AMICC | 256K X 8 OTP CMOS EPROM | 获取价格 |
|
| A278308A-70 | AMICC | 256K X 8 OTP CMOS EPROM | 获取价格 |
|
A277 相关文章
Bourns 密封通孔金属陶瓷微调电位计产品选型手册(英文版)
- 2024-09-20
- 6
Bourns 精密环境传感器产品选型手册(英文版)
- 2024-09-20
- 9
Bourns POWrTher 负温度系数(NTC)热敏电阻手册 (英文版)
- 2024-09-20
- 8
Bourns GMOV 混合过压保护组件产品选型手册(英文版)
- 2024-09-20
- 6
