RT4500A中文資料6-CH 43V LED Driver with PWM to DC Dimming數(shù)據(jù)手冊Richtek規(guī)格書
RT4500A規(guī)格書詳情
描述 Description
The RT4500A is a high efficiency driver for LEDs. It is suitable for single/two cell battery input to drive LED light bars which contains six strings in parallel and up to 12 LEDs per string. The internal current sinks support a maximum of ±2% current mismatching for excellent brightness uniformity in each string of LEDs. To provide enough headroom for current sink operation, the Boost controller monitors the minimum voltage of the feedback pins and regulates an optimized output voltage for power efficiency.
The RT4500A has a wide input voltage range from 2.7V to 24V and can provide adjustable LED current from 5mA to 40mA. The internal 150mΩ, 43V power switch with current mode control provides cycle-by-cycle over-current protection. The RT4500A also integrates analog dimming function for accurate LED current control. The input PWM dimming frequency can operate from 100Hz to 15kHz without inducing any inrush in LED current or inductor current. The switching frequency of the RT4500A is also adjustable from 300kHz to 1.2MHz, which allows flexibility between efficiency and component size.
The RT4500A is available in the WQFN-20L 4x4 package.
特性 Features
· Wide Operating Input Voltage : 2.7V to 24V
· High Output Voltage : Up to 43V
· Adjustable Channel Current : 5mA to 40mA
· Channel Current Regulation with Accuracy ±3% and Matching ±2%
· Dimming Controls? PWM to Analog Dimming Up to 15kHz with 10-bit Resolution? Direct PWM Dimming Up to 15kHz
· Switching Frequency : 300kHz to 1.2MHz
· Protections? LED Strings Open Detection? SBD Short Protection? Current Limit? Programmable Over-Voltage Protection? Output Under-Voltage Protection? Over-Temperature Protection
· 20-Lead WQFN Package
· RoHS Compliant and Halogen Free
應(yīng)用 Application
· Tablet and Notebook Backlight
技術(shù)參數(shù)
- 制造商編號
：RT4500A
- 生產(chǎn)廠家
：Richtek
- Vin(min) (V)
：2.7
- Vin(max) (V)
：24
- SWFreq(typ) (kHz)
：300-1200
- NumberofLEDs(max) (pcs)
：6
- Iout(max)/channel (mA)
：40
- Iq(typ) (mA)
：3
- DimmingControl
：PWM;PWM-to-Analog
- Topology
：Boost + Current Source
- Features
：Adjustable Frequency;Current Mode Control;OCP;OVP
- PackageType
：WQFN4x4-20
| 供應(yīng)商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
|---|---|---|---|---|---|---|---|
RICHTEK/立锜 |
21+ |
DFN-10L |
880000 |
明嘉萊只做原裝正品現(xiàn)貨 |
詢價 | ||
RICHTEK |
24+ |
DFN6 |
5000 |
全新原裝正品,現(xiàn)貨銷售 |
詢價 | ||
Richtek USA Inc. |
25+ |
10-UFBGA WLCSP |
9350 |
獨立分銷商 公司只做原裝 誠心經(jīng)營 免費試樣正品保證 |
詢價 | ||
RICHTEK/立锜 |
2450+ |
QFN |
8850 |
只做原裝正品假一賠十為客戶做到零風(fēng)險!! |
詢價 | ||
Richtek(立崎) |
23+ |
NA |
26094 |
10年以上分銷經(jīng)驗原裝進口正品,做服務(wù)型企業(yè) |
詢價 | ||
RICHTEK |
22+ |
DFN-10 |
30000 |
只做原裝正品 |
詢價 | ||
RICHTEK |
24+ |
DFN6 |
8000 |
新到現(xiàn)貨，只做全新原裝正品 |
詢價 | ||
Richtek USA Inc. |
22+ |
10WLCSP (0.87x2.07) |
9000 |
原廠渠道,現(xiàn)貨配單 |
詢價 | ||
RICHTEK/臺灣立锜 |
2447 |
6-WDFN(2x2) |
100500 |
一級代理專營品牌!原裝正品,優(yōu)勢現(xiàn)貨,長期排單到貨 |
詢價 | ||
RichtekUSAInc. |
24+ |
10-WLCSP(0.87x2.07) |
66800 |
原廠授權(quán)一級代理,專注汽車、醫(yī)療、工業(yè)、新能源！ |
詢價 |
