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參數(shù)資料
| 型號： | TPS60230RGTT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.2 A SWITCHED CAPACITOR REGULATOR, 1250 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, QFN-16 |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 640K |
| 代理商： | TPS60230RGTT |
www.ti.com
10
mA/div
2
V/div
PWM
ILED(D1)
0 V
PWM Into EN1 and EN2, VI = 3.6 V,
ILED = 20 mA, 5 LEDs Connected,
f = 1 kHz, TA = 255C
200 ms/div
0 A
10
mA/div
2
V/div
PWM
ILED(D1)
0 V
PWM Into EN1 and EN2, VI = 3.6 V,
ILED = 20 mA, 5 LEDs Connected,
f = 32 kHz, TA = 255C
5 ms/div
0 A
100
mA/div
5
V/div
EN1 + EN2
II
0 V
0 A
1
V/div
0 V
VOUT
VI = 3.6 V, ILED = 20 mA,
5 LEDs Connected,
TA = 255C
20
s/div
DETAILED DESCRIPTION
OPERATION
TPS60230
SLVS516A – MAY 2004 – REVISED JUNE 2004
DIMMING RESPONSE
Figure 9.
Figure 10.
STARTUP TIMING
Figure 11.
The TPS60230 uses a fractional conversion charge pump to generate a supply voltage for the integrated current
sinks. These current sinks are used to ensure a constant current for each LED. Depending on the input voltage
and programmed LED current, the charge pump either operates in the 1x mode or in the 1.5x mode. By
switching automatically between these two modes, the circuit optimizes power conversion efficiency as well as
extends operating time by allowing the discharge of the battery completely.
The charge pump can generate 125 mA of output current, so each of the 5 LED outputs can be powered with up
to 25 mA of current. The maximum LED current is set by a resistor connected to the ISET pin. This resistor
programs a reference current, which is current mirrored to set the LED current.
8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS60230RGTTG4 | 功能描述:電荷泵 5-Channel 125-mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TPS60231 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL |
| TPS60231EVM-047 | 功能描述:電源管理IC開發(fā)工具 TPS60231 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS60231RGTR | 功能描述:電荷泵 3-Ch 75-mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TPS60231RGTRG4 | 功能描述:電荷泵 3-Ch 75-mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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