- 您现在的位置：买卖IC网 > Datasheet目录996 > NCP5604AAGEVB (ON Semiconductor)EVAL BOARD FOR NCP5604AAG Datasheet资料下载
参数资料
| 型号： | NCP5604AAGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/15页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP5604AAG |
| 产品变化通告： | Product Obsolescence 30/Jun/2011 |
| 设计资源： | NCP5604A EVB BOM NCP5604AAGEVB Gerber Files NCP5604 EVB Schematic NCP5604 Demo Brd BOM |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 100mA |
| 输出及类型： | 4，非隔离 |
| 输出电压： | 4.8 ~ 6 V |
| 特点： | 通-断开关 |
| 输入电压： | 2.85 ~ 5.5 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP5604 |
| 其它名称： | NCP5604AAGEVBOS |
NCP5604A, NCP5604B
ANALOG SECTION (Typical values are referenced to T A = +25 ° C, Min & Max values are referenced -40 ° C to +85 ° C ambient
temperature, operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.)
Pin
3
3
-
Symbol
I REF
V REF
I LEDR
Rating
Reference Current @ Vref = 600 mV (Note 11)
Reference Voltage (Note 12)
Reference Current (IREF) to Output LED Current Ratio
Min
1.0
-2%
-
Typ
-
600
260
Max
100
+2%
-
Unit
m A
mV
-
11. The overall output current tolerance depends upon the accuracy of the external resistor. Using 1% or better resistor is recommended.
12. The external circuit must not force the I REF pin voltage either higher or lower than the 600 mV specified.
DIGITAL PARAMETERS SECTION (Typical values are referenced to T A = +25 ° C, Min & Max values are referenced -40 ° C to +85 ° C
ambient temperature, operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.) Note: Digital inputs undershoot < - 0.30 V to
ground, Digital inputs overshoot < 0.30 V to V BAT .
Pin
2
2
2
Symbol
F PWM
V IH
V IL
Rating
Input Enable PWM
Positive Going Input High Voltage Threshold, EN Signal
Negative Going Input High Voltage Threshold, EN Signal
Min
0.1
1.3
0
Typ
-
-
-
Max
200
V BAT
0.4
Unit
kHz
V
V
APPLICATIONS INFORMATION
DC-DC OPERATION
The converter is based on a charge pump technique to
generate a DC voltage capable to supply the White LED
load The system regulates the current flowing into each
LED by means of internal current mirrors associated with
the white diodes. Consequently, the output voltage will be
voltage is based on a temperature compensated Band Gap
structure, a tight tolerance resistor will provide a very
accurate load current. The resistor is calculated from the
Ohm's law (R bias = Vref/I REF ) and a more practical
equation can be arranged to define the resistor value for a
given output current:
equal to the Vf of the LED, plus the 300 mV (typical)
developed across the internal NMOS mirror. Typically,
assuming a standard white LED forward biased at 10 mA,
the output voltage will be 3.8 V.
Rbias + (Vref * k) Iout
Rbias + (0.6 * 260) Iout
Rbias + 156 Iout
(eq. 1)
(eq. 2)
The third external capacitor makes possible the 1.33X
extra mode of operation, with a significant efficiency
improvement of the converter over the normal battery
voltage span. The threshold levels have been defined to
optimize this range of operating voltage, assuming a high
efficiency is not relevant when the system is connected to
a battery charger ( i.e. Vbat > 4.5 V).
The built-in OVP circuit continuously monitor each
output and stops the converter when the voltage is above
5.0 V. The converter resumes to normal operation when the
voltage drops below 5.0 V (no latch-up mechanism).
Consequently, the chip can operate with no load during any
test procedures, but in the case of special applications, it is
Consequently, the resistor value will range between
R bias = 156/25 mA = 6240 W and R bias = 156/0.5 mA =
312 k W . Obviously, the tolerance of such a resistor must be
1% or better, with a 100 ppm thermal coefficient, to get the
expected overall tolerance.
VBandGap
LED Return
recommended to connect the non used LED driver either to
a LED, or to the Vbat supply to minimize the internal losses
(see LOAD CONNECTION paragraph).
+
-
600mV
Pin 5 to 8
LOAD CURRENT CALCULATION
The load current is derived from the 600 mV reference
voltage provided by the internal Band Gap associated to the
I REF
Pin 3
GND
external resistor connected across I REF pin and Ground (see
Figure 4). In any case, no voltage shall be forced at I REF
pin, either downward or upward.
The reference current is multiplied by the constant
GND
Note: The I REF pin must never be biased
to voltage higher than 600 mV.
Figure 4. Basic Reference Current Source
k = 260 to yield the output load current. Since the reference
http://onsemi.com
8
相关PDF资料 |
PDF描述 |
|---|---|
| NCP5608EVB | EVAL BOARD FOR NCP5608 |
| NCP5612GEVB | EVAL BOARD FOR NCP5612G |
| NCV7680PWR22GEVB | BOARD EVALUATION NCV7680 |
| NDNA200 | DIN-RAIL 35MM ALUMINUM 2M |
| NG-9517 | CABLE GLAND NEMA 4X PG-29 BLACK |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5604AMTR2G | 功能描述:LED照明驱动器 ANA LED DRIVER RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| NCP5604B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Efficiency White LED Driver |
| NCP5604BMTR2G | 功能描述:LED照明驱动器 ANA LED DRIVER RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| NCP5604D WAF | 制造商:ON Semiconductor 功能描述: |
| NCP5608 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Multiple LED Charge Pump Driver |
发布紧急采购，3分钟左右您将得到回复。