|
|||||||||||||||||||||
|
|||||||||||||||||||
[로봇사이언스몰][Pololu][폴로루] DRV8801 Single Brushed DC Motor Driver Carrier #2136
This tiny breakout board for TI’s DRV8801 provides a modern alternative to classic motor drivers such as the L293D, SN754410, and L298N. It can deliver a continuous 1 A (2.8 A peak) to a single motor and offers a wide operating voltage range of 8 V to 36 V. The DRV8801 features a simple two-pin speed/direction interface, current-sense feedback, and built-in protection against under-voltage, over-current, and over-temperature.
Overview
Texas Instruments’ DRV8801 is a tiny H-bridge motor driver IC that can be used for bidirectional control of a single brushed DC motor at 8 V to 36 V. It can supply up to about 1 A continuously and can tolerate peak currents up to 2.8 A for a few seconds, making it a good choice for small motors that run on a wide range of voltages. Since this board is a carrier for the DRV8801, we recommend careful reading of the DRV8801 datasheet (1MB pdf). The board ships populated with all of its SMD components, including the DRV8801.
For a more powerful driver with a similar operating voltage range, please consider our MAX14870 carrier. For a dual-channel driver with a similar operating voltage range, please consider our A4990 carrier or A4990 Arduino shield. For lower-voltage alternatives to the DRV8801, please consider our DRV8838 single-channel motor driver carrier and DRV8833 and DRV8835 dual motor driver carriers.
In a typical application, power connections are made on one side of the board and control connections are made on the other. Aside from motor and power connections, the only required pins are DIR and PWM (called PHASE and ENABLE in the DRV8801 datasheet, respectively). A PWM signal can be applied to the PWM/ENABLE pin to achieve variable speed control in the direction determined by the state of the DIR/PHASE pin. The carrier board pulls PWM low by default, so the driver is only enabled when this pin is supplied with a high signal. The DIR pin does not have a defined default state, which means outputs could behave erratically if the DIR pin is left disconnected while the PWM pin is high.
The BRAKE pin determines whether the motor brakes or coasts when PWM pin is low (this pin is called MODE1 in the DRV8801 datasheet). The carrier board pulls it high, which corresponds to braking (both motor outputs are shorted together through ground). Setting the BRAKE pin low sets the outputs to coast whenever the PWM pin is low (both motor outputs are off). We generally recommend leaving this high while supplying a PWM signal to the PWM pin to get drive-brake (or “slow-decay”) operation, as this typically provides a more linear relationship between PWM duty cycle and motor speed than drive-coast (or “fast-decay”), and it can result in better performance at low duty cycles. The following truth table shows how the PWM, DIR, and BRAKE pins affect the driver outputs:
DRV8801 Truth Table | |||||
---|---|---|---|---|---|
PWM/ENABLE | DIR/PHASE | BRAKE/MODE1 | OUT+ | OUT- | operating mode |
PWM | 1 | 1 | PWM (H/L) | L | forward/brake at speed PWM % |
PWM | 0 | 1 | L | PWM (H/L) | reverse/brake at speed PWM % |
L | X | 1 | L | L | brake low (outputs shorted to ground) |
PWM | 1 | 0 | PWM (H/OPEN) | PWM (L/OPEN) | forward/coast at speed PWM % |
PWM | 0 | 0 | PWM (L/OPEN) | PWM (H/OPEN) | reverse/coast at speed PWM % |
L | X | 0 | OPEN | OPEN | coast (outputs off) |
Note: When braking, the driver brakes low because the DRV8801’s MODE2 pin is pulled low on the carrier board. The MODE2 pin is not exposed to the user.
The SLEEP pin is pulled high on the board through a 10k resistor and can be left disconnected if you do not want to use the low-power sleep mode of the DRV8801.
The FAULT pin is an open-drain output that is driven low by the chip whenever an over-current, over-temperature, or under-voltage condition occurs. The carrier board includes a pull-up resistor on this pin, so no external pull-up is necessary. Note that the FAULT pin is a status-only signal that does not affect device functionality, so a low FAULT signal does not necessarily mean the driver outputs are disabled. For example, the driver will start operating normally once the motor supply voltage is above 8 V, but the FAULT output will be low until the motor supply voltage reaches approximately 12 V. Please see the datasheet for more information about how the DRV8801 responds to and reports faults.
The CS pin outputs an analog voltage proportional to the motor current (approximately 500 mV per A).
PIN | Default State | Description |
---|---|---|
VMM/VBB | 8 V to 36 V motor power supply connection. This pin called VBB in the DRV8801 datasheet. | |
VDD | 3.3 V to 6.5 V logic power supply connection. This pin is only used to power the FAULT, SLEEP, and BRAKE pull-up resistors on the carrier board. (The DRV8801 has its own internal logic voltage regulator.) | |
GND | Ground connection points for the motor and logic power supplies. The control source and the motor driver must share a common ground. | |
OUT+ | H-bridge output +. | |
OUT- | H-bridge output -. | |
DIR/PHASE | undefined | Logic input for controlling motor direction. |
PWM/ENABLE | LOW | Logic input for enabling the driver outputs/controlling motor speed. A PWM signal can be applied to this pin. |
BRAKE/MODE1 | HIGH | Logic input for controlling whether the driver brakes low or coasts when PWM pin is low. A logic high results in braking (slow-decay through ground). |
SLEEP | HIGH | Logic input that puts the DRV8801 into a low-power sleep mode when low. |
FAULT | Logic output that drives low when a fault occurs. The carrier board pulls this pin up to VDD. | |
CS/VPROPI | Analog voltage output proportional to motor current (500 mV per A). Note: this pin will output 0 V whenever the driver is in slow-decay mode (i.e., when BRAKE/MODE1 is HIGH). |
The DRV8801 datasheet recommends a maximum continuous current of 2.8 A. However, the chip by itself will overheat at lower currents. For example, in our tests at room temperature with no forced air flow, the chip was able to deliver 2.8 A for a few seconds, 1.4 A for approximately 30 s, and 1.2 A for almost two minutes before the chip’s thermal protection kicked. A continuous current of 1 A per channel was sustainable for many minutes without triggering a thermal shutdown. The actual current you can deliver will depend on how well you can keep the motor driver cool. The carrier’s printed circuit board is designed to draw heat out of the motor driver chip, but performance can be improved by adding a heat sink. Our tests were conducted at 100% duty cycle; PWMing the motor will introduce additional heating proportional to the frequency.
This product can get hot enough to burn you long before the chip overheats. Take care when handling this product and other components connected to it.
Breakaway 0.1″ male headers are included with the DRV8801 motor driver carrier, which can be soldered in to use the driver with perfboards, breadboards, or 0.1″ female connectors. (The headers might ship as a single larger strip that can be broken into smaller pieces.) The right picture above shows the two possible board orientations when used with these header pins (parts visible or silkscreen visible). You can also solder your motor leads and other connections directly to the board, or you could use 0.1″ terminal blocks (not included) to allow for easy, temporary connections:
Size: | 0.6″ × 0.6″1 |
---|---|
Weight: | 0.7 g1 |
Motor driver: | DRV8801 |
---|---|
Motor channels: | 1 |
Minimum operating voltage: | 8.0 V |
Maximum operating voltage: | 36 V |
Continuous output current per channel: | 1 A2 |
Peak output current per channel: | 2.8 A |
Current sense: | 0.5 V/A |
Reverse voltage protection?: | N |
b. 해외상품 :
1) 해당상품: 아이콘이 부착된 상품
2) 구매금액 700,000원 이상 : 입금확인 후 최소 5일 ~ 최대 2주
3) 구매금액 700,000원 이하 : 입금확인 후 최소 1주 ~ 최대 8주
4) 단, 해외계약업체에 품절되지 않은 상품에 한함
② 구매상품 종류가 많을 경우 예상 준비기간 보다 더 소요 될 수 있습니다.
③ 주문하신 상품은 출고완료 메일 또는 문자 수신 후 익일~최대7일(도서,산간지역)
이내에 수령하실 수 있습니다.
④ 제주(\3,500원)/도서지역(\5,000원)은 배송비가 추가됩니다.
제주,도서, 산간지역은 타 지역보다 배송기간이 길어질 수 있습니다.
⑤ 아이콘이 부착된 상품이라도 국내재고가 있을 수 있습니다.
⑥ 해외 현지 사정으로 인해 공지한 배송기간보다 더 길어 질 수 있습니다.
⑦ 해외상품은 반품/교환/취소가 어려울 수 있으니 신중히 주문하시기 바랍니다.
3. 소비자의 단순변심/착오구매에 의한 청약철회제한안내
① 전자상거래 등에서의 소비자보호에 관한 법률 제17조 제2항 및 동 시행령
제21조에 의한 청약철회 제한 사유에 해당하는 경우 및 기타 객관적으로
이에 준하는 것으로 인정되는 경우에 한합니다.
② 소비자의 단순변심, 착오구매에 의한 교환/반품 시에 발생하는 배송비는
소비자가 부담합니다.
③ 판매자의 실수,제품하자 등의 사유로 인한 배송비는 판매자가 부담합니다.
4. 상품의 교환/반품/보증조건 및 품질보증기준안내
① 상품이 공급된 날(배송완료일)로부터 7일 이내에 교환/반품을 신청 할 수 있습니다.
그러나 아래의 사유에 해당 하는 경우에는 교환/반품 신청이 받아들여지지 않을 수도 있습니다.
a. 소비자의 책임으로 인해 상품이 훼손/멸실 된 경우(확인을 위한 포장훼손제외)
b. 소비자의 사용에 의해 상품의 가치가 현저하게 감소한 경우
c. 시간의 경과로 인해 상품의 재판매가 불가하게 된 경우
d. 판매방식의 특성으로 판매자에게 회복할 수 없는 피해가 발생한 경우 (주문제작 상품, 청약철회상품 등)
② 교환/반품/보증조건 및 품질보증기준은 『소비자기본법』에 따른 소비자분쟁해결기준에 따라 피해를 보상합니다.
5. 소비자피해보상 처리, 재화 등에 대한 불만 및 분쟁처리 안내
판매자 | 본사 | 셀러등급 | |
---|---|---|---|
상호명 | (주)위키모바일(로봇사이언스몰) | 대표자 | 김경식 |
사업자등록번호 | 215-87-14086 | 통신판매신고번호 | 제2008-서울송파-0867호 |
연락처 | 02-2283-1300 | 사업장 소재지 | 서울특별시 송파구 문정동 643-1 엠스테이트 B동704호 |
| ||||||||||||||||||||||||||
쇼핑몰이용안내 | |
전자계약사이트 | |
|
|||||||||
회사명 : (주)위키모바일(로봇사이언스몰)
| 사업자등록번호 : 215-87-14086 [사업자정보확인]
| 주소 : 서울특별시 송파구 법원로 114 엠스테이트 B동704호 통신판매업 신고 : 제2008-서울송파-0867호 | 연락처 : 02-2283-1300 | FAX : 02-2283-1304 | 개인정보보호 책임자 : 김 경식 | 대표자 : 김경식 호스팅사업자 : 가비아 퍼스트몰 | contact : ask@wikimobile.co.kr for more information *로봇사이언스몰의 콘텐츠 저작권은 (주)위키모바일에 있으며 무단·전재·복사 배포를 금합니다. |
|||||||||