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| 型号： | KIT33886DHEVB |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MC33886 H-BRIDGE |
| 标准包装： | 1 |
| 主要目的： | 电源管理，H 桥驱动器（内部 FET） |
| 嵌入式： | 否 |
| 已用 IC / 零件： | MC33886 |
| 主要属性： | 5?V ~ 40?V 电源，5A 输出 |
| 次要属性： | 短路、热和欠压保护 |
| 已供物品： | 板，CD |
| 相关产品： | MC33886VWR2-ND - IC H-BRIDGE 5.0A 20-HSOP MC33886DHR2-ND - IC H-BRIDGE 5.0A 20-HSOP MC33886VW-ND - IC H-BRIDGE 5.0A OUTPUT 20-HSOP MC33886DH-ND - IC H-BRIDGE 5.0A OUTPUT 20-HSOP |
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FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
Numerous protection and operational features (speed,
torque, direction, dynamic braking, and PWM control), in
addition to the 5.0 A current capability, make the 33886 a
very attractive, cost-effective solution for controlling a broad
range of fractional horsepower DC motors. A pair of 33886
devices can be used to control bipolar stepper motors in both
directions. In addition, the 33886 can be used to control
permanent magnet solenoids in a push-pull variable force
fashion using PWM control. The 33886 can also be used to
excite transformer primary windings with a switched square
wave to produce secondary winding AC currents.
As shown in Figure 2 , Simplified Internal Block Diagram,
with Fault Status reporting. For a DC motor to run t he input
conditions need be as follows: D1 input logic Low, D2 input
logic High, FS flag cleared (logic High), with one IN logic Low
and the other IN logic High to define output polarity. The
33886 can execute dynamic braking by simultaneously
turning on either both high side MOSFETs or both low side
MOSFETs in the output H-Bridge; e.g., IN1 and IN2 logic
High or IN1 and IN2 logic Low.
The 33886 outputs are capable of providing a continuous DC
load current of 5.0 A from a 40 V V+ source. An internal
charge pump supports PWM frequencies up to 10 kHz. An
external pull-up resistor is required for the open drain FS pin
for fault status reporting.
Two independent inputs (IN1 and IN2) provide control of the
two totem-pole half-bridge outputs. Two disable inputs (D1
and D2) are for forcing the H-Bridge outputs to a high-
impedance state (all H-Bridge switches OFF).
The 33886 has undervoltage shutdown with automatic
recovery, active current limiting, output short-circuit latch-
OFF, and overtemperature latch-OFF. An undervoltage
shutdown, output short-circuit latch-OFF, or overtemperature
latch-OFF fault condition will cause the outputs to turn OFF
(i.e., become high-impedance or tri-stated) and the fault
output flag to be set Low. Either of the Disable inputs or V+
must be “toggled” to clear the fault flag.
The short-circuit / overtemperature shutdown scheme is
unique and best described as using a junction temperature-
dependent active current “fold back” protection scheme.
When a short-circuit condition is experienced, the current
limited output is “ramped down” as the junction temperature
increases above 160 ? C, until at 175 ? C the current has
decreased to about 2.5 A. Above 175 ? C, overtemperature
shutdown (latch-OFF) occurs. This feature allows the device
to remain in operation for a longer time with unexpected
loads, while still retaining adequate protection for both the
device and the load.
FUNCTIONAL PIN DESCRIPTION
POWER/ANALOG GROUNDS (PGND AND AGND)
Power and analog ground pins. The power and analog
ground pins should be connected together with a very low-
impedance connection.
POSITIVE POWER SUPPLY (V+)
V+ pins are the power supply inputs to the device. All V+ pins
must be connected together on the printed circuit board with
as short as possible traces offering as low-impedance as
possible between pins.
V+ pins have an undervoltage threshold. If the supply voltage
drops below a V+ undervoltage threshold, the output power
stage switches to a tri-state condition and the fault status flag
is set and the Fault Status pin voltage switched to a logic Low.
When the supply voltage returns to a level that is above the
threshold, the power stage automatically resumes normal
operation according to the established condition of the input
pins and the fault status flag is automatically reset logic High.
FAULT STATUS (FS)
This pin is the device fault status output. This output is an
active Low open drain structure requiring a pull-up resistor to
LOGIC INPUT 1, 2 AND DISABLE1, 2 (IN1, IN2, D1,
AND D2)
These pins are input control pins used to control the outputs.
These pins are 5.0 V CMOS-compatible inputs with
hysteresis. The IN1 and IN2 independently control OUT1 and
OUT2, respectively. D1 and D2 are complimentary inputs
used to tri-state disable the H-Bridge outputs.
When either D1 or D2 is set (D1 = logic High or D2 = logic
Low) in the disable state, outputs OUT1 and OUT2 are both
tri-state disabled; however, the rest of the device circuitry is
fully operational and the supply I Q (STANDBY) current is
33886
Analog Integrated Circuit Device Data ?
16
Freescale Semiconductor
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相关代理商/技术参数 |
参数描述 |
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| KIT33887DWBEVB | 功能描述:电源管理IC开发工具 33887DWB FIESTA EVAL KIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33887EKEVBE | 功能描述:电源管理IC开发工具 33887DWB FIESTA EVAL KIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33887EKEVBE | 制造商:Freescale Semiconductor 功能描述:5.2A 20KHz Inductive load driver w/ Curr |
| KIT33887PNBEVB | 功能描述:电源管理IC开发工具 33887 FIESTA PNB KIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| KIT33903BD3EVBE | 功能描述:界面开发工具 3V DUAL LIN EVB KIT RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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