
產(chǎn)品簡介:
The XL2576 is a 52 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. An internal compensation BLOCK is built in to minimize external component count.
產(chǎn)品優(yōu)勢特點:
Wide 4.5V to 40V Input Voltage Range
5V,12V and adjustable versions
Output Adjustable from 1.23V to 37V
Maximum Duty Cycle 100%
Minimum Drop Out 1.5V
Fixed 52KHz Switching Frequency
3A Constant Output Current Capability
Internal Optimize Power Transistor
High efficiency
Excellent line and load regulation
TTL shutdown capability
ON/OFF pin with hysteresis function
Built in thermal shutdown function
Built in current limit function
Available in TO-220,TO-263 packages
應(yīng)用領(lǐng)域:
LCD Monitor and LCD TV
Digital Photo Fram
Set-up Bo
ADSL Modem
Telecom / Networking Equipment


XL4012 大電流12A PWM DC/DC, TO220輸入3.6-25V ,輸出0.8V-23V轉(zhuǎn)換效率高達(dá)95% (功能兼容)---,完全替代LM2677,LM2678,LM2679
XL4012 大電流 12A PWM ***DC/DC
(一)輸入3.6-25V ,輸出0.8V-23V轉(zhuǎn)換效率高達(dá)95%
(功能兼容)---,LM2677,LM2678,LM2679
XL4012 ***率、同步***穩(wěn)壓器.輸入電壓范圍可由***3.6伏特到***30伏特,輸出電壓0.8V--23V可調(diào)整且輸出電流可高達(dá)12A,非常適合于大尺寸液晶電視,***電子,工業(yè)控制供電,智能安防,網(wǎng)絡(luò)通訊等設(shè)備的電壓轉(zhuǎn)換.
XL4012應(yīng)用電路非常簡單,外圍器件***.,其內(nèi)部具有完整的系統(tǒng)保護(hù) 功能包括可調(diào)式軟啟動(adjustable soft-start)、短路保護(hù)(SCP) 、過溫度保護(hù)(OTP)及可調(diào)式過電流保護(hù)(adjustable OCP)功能,切換頻率固定為260KHz.XL4012采用標(biāo)準(zhǔn)的TO-220-5L無鉛封裝,.可以兼容IC型號有:LTC3610,LTM4601
XL1507完全兼容Pin to PinAP1507
XL1509完全兼容Pin to PinAP1509
XL2576完全兼容Pin to PinLM2576, LM2575
XL2576P完全兼容Pin to PinGL2576P, LM2575
XL2596完全兼容Pin to PinLM2596, AP1501, MIC4576,AP1506
是***型開關(guān)穩(wěn)壓器,具有非常小的電壓調(diào)整率和電流調(diào)整率,能夠輸出3.3V、5V、12V 固定電壓和可調(diào)節(jié)電壓輸出方式,在規(guī)定的輸入電壓和輸出負(fù)載的條件下,XL系列產(chǎn)品輸出電壓的誤差范圍為±4%;振蕩器的振蕩頻率誤差范圍為±10%;典型的待機(jī)電流為70μA,芯片內(nèi)置過流保護(hù)電路和過熱保護(hù)電路。
220V-50Hz 生活用電經(jīng)***整流成4.5V~40V 直流電源為系統(tǒng)供電,經(jīng)XL1507/XL1509/XL2576/XL2576P/XL2596***得到穩(wěn)定的電源,可根據(jù)不同應(yīng)用改變R1、R2 的比例關(guān)系,從而使輸出電壓VOUT 可靈活變化,如R1=1K、R2=3K,則輸出電壓為4.92V;XL1507/XL1509/XL2576/XL2576P/XL2596 采用TO-252 TO220 和TO263封裝,可PIN 對PIN 替換完全XL1507完全兼容Pin to PinAP1507
XL1509完全兼容Pin to PinAP1509
XL2576完全兼容Pin to PinLM2576, LM2575
XL2576P完全兼容Pin to PinGL2576P, LM2575
XL2596完全兼容Pin to PinLM2596, AP1501, MIC4576,AP1506。
優(yōu)點:1、輸入、輸出電壓范圍寬;
(二)IC 內(nèi)部CV,OVP 通過PWM 控制,輸出電壓,輸出過壓保護(hù)精度更高,響應(yīng)速度更快,內(nèi)置過流、過熱保護(hù),安全性更高;
(三)外圍元件少,低紋波。輸入25V 電壓,輸出12V 情況下,效率可達(dá)到90%。
其他幾款同類型的芯片為:XL1509、XL2576、XL2576P、XL2596。