|
|
PDF APW7000 Data sheet ( Hoja de datos )
| Número de pieza | APW7000 | |
| Descripción | 1X/1.5X/2x Charge Pump White LED Driver | |
| Fabricantes | ANPEC | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de APW7000 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
APW7000
1X/1.5X/2x Charge Pump White LED Driver
Features
• ±1.5% LED Current Matching
• High Efficiency Up to 90% Over Li-ion Battery
Discharge
• Output Current Up to 30mA Per LED
• 2.7V to 5.5V Operating Voltage
• Allow to Turn On or Off a Combination of LEDs
• 1x/1.5x/2x Charge Pump Modes
• Low Shutdown Current: 2µA Maximum
• Low Input Ripple and EMI
• Internal Soft-Start Limits Inrush Current
• Short Circuit Current Limit
• Thermal Shutdown Protection
• Output Over-Voltage Protection
• 16-Pin QFN Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Cellular Phone White LED Back Light
• Portable Device
• PDA, Handheld Computer
• DSC
General Description
The APW7000 is a high efficiency charge pump white
LED driver; the device drives up to four white LEDs with
regulated constant current for uniform intensity. The sup-
ply voltage ranges from 2.7V to 5.5V and it is optimized for
a Li-ion battery application. The APW7000 operates in 1x,
1.5x, and 2x charge pump modes and automatically
switches the charge pump modes depend on the input
voltage to maintain the required power for high power
efficiency. The APW7000 provides up to 30mA per LED,
for a total of 120mA and allows several methods such as
a PWM signal on the CTRL0 pin for LED dimming. Three
control logic pins allow to disable or enable a combina-
tion of LEDs. The supply current is only 2mA in 2x mode,
and the EN pin allows the device to enter shutdown mode
with 2µA quiescent current. The APW7000 switches at
1MHz frequency and only requires four 1µF ceramic ca-
pacitors and one resistor, and ensures low input current
ripple and EMI.
The APW7000 is available in a 16-pin QFN package.
Pin Configuration
16 15 14 13
EN 1
CTRL0 2
CTRL1 3
CTRL2 4
Metal
GND Pad
(Bottom)
12 GND
11 C1-
10 C1+
9 C2-
56 78
QFN4x4-16
(Top View)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Feb., 2009
1
www.anpec.com.tw
1 page  
APW7000
Typical Operating Characteristics (Cont.)
LED Current vs. Input Voltage
21
LED Current vs. Input Voltage
32
20
19
4 LEDs at 20mA
18
17
31
30
29
4 LEDs at 30mA
28
27
26
16
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Logic Threshold Voltage vs. Input Voltage
1.2
1.1 high threshold
1
0.9
low threshold
0.8
0.7
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
1200 Switching Frequency vs. Temperature
1100
in 2x mode
VIN=4V
1000
25
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Switching Frequency vs. Input Voltage
1200
1150
1100
in 2x mode
ILED=20mA
1050
1000
950
900
850
800
2.5
21
3 3.5 4
Input Voltage (V)
LED Current vs. Temperature
4.5
4 LEDs at 20mA
VIN=4V
20
900
19
800
700
18
600
500
-40 -20 0 20 40 60 80 100 120 140
Temperature (°C)
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Feb., 2009
5
17
-40 -20 0 20 40 60 80 100 120 140
Temperature (°C)
www.anpec.com.tw
5 Page 
APW7000
Function Description (Cont.)
LED Current Setting (Cont.)
400
350
300
250
200
150
100
50
0
0 5 10 15 20 25
ILED (mA)
Figure 1. RSET Value vs. LED Current
30
Shutdown/Enable
Pull the EN above 1.3V to enable the device and pull EN
pin below 0.3V to disable the device. In shutdown mode,
all internal control circuits are turned off and the quies-
cent current is below 2µA. When the device exits shut-
down mode, the output has soft-start function as the in-
put voltage startup.
Over-Voltage Protection
If any of LEDs is failed or unused LED channel is not
connected to the VOUT, the charge pump mode will go
into 2x mode and the output voltage will be pumped to 2
times the input voltage. If the output voltage is over 5.5V,
the over-voltage protection circuit will limit the output volt-
age to approximately 5.5V.
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Feb., 2009
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet APW7000.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| APW7000 | 1X/1.5X/2x Charge Pump White LED Driver | ANPEC |
| APW7001 | 1X/1.5X/2X Charge Pump White LED Driver | ANPEC |
| APW7004 | Synchronous-Rectifier PWM Controller for Pentium II Microprocessor |  Anpec Electronics Coropration |
| APW7008 | 1X/1.5X/2x Charge Pump White LED Driver | ANPEC |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |