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2998

更新时间: 2024-11-06 22:35:47
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器
页数 文件大小 规格书
6页 165K
描述
DUAL FULL-BRIDGE MOTOR DRIVER

2998 数据手册

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2998  
DUAL FULL-BRIDGE  
MOTOR DRIVER  
As an interface between low-level logic and solenoids, dc (brush)  
motors, or stepper motors, the UDN2998W dual full-bridge driver will  
operate inductive loads up to 50 V with continuous output currents of  
up to 2 A per bridge or peak (start-up) currents to 3 A. The control  
inputs are compatible with TTL, DTL, and 5 V CMOS logic. Except  
for a common supply voltage and thermal shutdown, the two drivers in  
each package are completely independent.  
For external PWM control, an Output Enable for each bridge  
circuit is provided and the sink driver emitters are pinned out for  
connection to external current-sensing resistors. The chopper drive  
mode is characterized by low power dissipation levels and maximum  
efficiency. A PHASE input to each bridge determines load-current  
direction.  
Extensive circuit protection is provided on-chip. Both ground-  
clamp and flyback diodes for each bridge are provided. A thermal  
shutdown circuit disables the load drive if chip temperature rating  
(package power dissipation) is exceeded. Internally-generated delays  
provide crossover-current protection.  
Dwg. No. W-106  
The UDN2998W is packaged in a 12-pin single in-line power-tab  
package for high power capabilities. Driving either of the bridges at  
the full 2 A dc rating requires the use of an external heat sink. The tab  
is at ground potential and needs no insulation.  
ABSOLUTE MAXIMUM RATINGS  
at TJ +150°C  
Supply Voltage, VBB .......................... 50 V  
Output Current, IOUT (continuous) ..... 2 A  
(peak)........................................... 3 A  
Sink Driver Emitter Voltage, VE ...... 1.5 V  
Logic Input Voltage Range,  
FEATURES  
I
I
I
I
I
I
I
I
3 A Peak Output Current  
Output Voltage to 50 V  
Integral Output Suppression Diodes  
Output Current Sensing  
TTL/CMOS Compatible Inputs  
Internal Thermal Shutdown Circuitry  
Crossover-Current Protected  
Automotive Capable  
VPHASE or VENABLE ....... -0.3 V to 15 V  
Package Power Dissipation,  
PD ....................................... See Graph  
Operating Temperature Range,  
TA .............................. -20°C to +85°C  
Storage Temperature Range,  
TS ............................. -55°C to +150°C  
NOTE: Output current rating may be limited  
by chopping frequency, ambient tempera-  
ture, air flow, or heat sinking. Under any set  
of conditions, do not exceed the specified  
current rating or a junction temperature of  
+150°C.  
Always order by complete part number: UDN2998W .  

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