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参数资料
| 型号： | TPS60230RGTT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.2 A SWITCHED CAPACITOR REGULATOR, 1250 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, QFN-16 |
| 文件页数： | 19/20页 |
| 文件大小： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS60230RGTTG4 | 功能描述:电荷泵 5-Channel 125-mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60231 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL |
| TPS60231EVM-047 | 功能描述:电源管理IC开发工具 TPS60231 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS60231RGTR | 功能描述:电荷泵 3-Ch 75-mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TPS60231RGTRG4 | 功能描述:电荷泵 3-Ch 75-mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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