전자부품 데이터시트 검색엔진 |
|
LM3647 데이터시트(PDF) 9 Page - National Semiconductor (TI) |
|
|
LM3647 데이터시트(HTML) 9 Page - National Semiconductor (TI) |
9 / 17 page 9 www.national.com Slow PWM-mode: The PWM-pin turns the external current source on and off at a rate of 0.1Hz. (This example is just one of many possible design solutions.) The PWM-pin (SLOW_PWM) turns the transistor Q1 on and off. When the transistor is off the current source is on, and when the transistor is on the current source is off (V_OUT at approximate 0.7V). The value of R1 de- pends on the size of the charge current (see formula): The PWM duty cycle for the different charge cycles are listed below: 4.3.9 User Interface The user interface consists of three LEDs and one buzzer. The LEDs have four different states: On, off, slow flash (~1 Hz) and fast flash (~10 Hz). The buzz- er has three different states: off, one short beep (~100ms) and one long beep (~1s). The user interface is designed in a flexible way. Use of the buzzer or the LEDs is optional, depending on design require- ments. It is possible to use the LM3647 with one, two or all three LEDs. A single Charged Status LED can be implemented with a 2- input NAND gate on LED1 and LED3. In this implemention, note that a pull-up resistor is required on LED1 and LED3. Ni-Cd/Ni-MH User Interface Scheme C2 1uF C1 1uF C9 1uF R5 10k R6 10k R22 10k PWM DC-PWM CURRENT-LIMITER I out =Vd = Voltage Drop Across D1 1.25 - Vd R1 Charge Phase: PWM Duty Cycle: Soft Start 10% Fast Charge 100% Topping Charge 10% Maintenance Charge 5% Charge phase LED1 status LED2 status LED3 status Buzzer status No battery Off Off Off Off New battery / Temp-test Fast flash Off Off Short beep Softstart charge Slow flash Off Off Off Charging On Slow flash Off Off Topping charge On Fast flash Off Off Maintenance On Off On Long beep Discharge Off Slow flash Off Off Temperature error 2 Fast flashes Off On Short beep Error Fast flash Off Fast flash Short beep |
유사한 부품 번호 - LM3647 |
|
유사한 설명 - LM3647 |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |