ncp5604 ON Semiconductor, ncp5604 Datasheet - Page 9

• Manufacturer Part Number: ncp5604
• Description: Current Mode Charge Pump Led Driver
• Manufacturer: ON Semiconductor

Figure 7. Typical LED to LED Current Matching at I
-1
-2
-3
-4
-5
Figure 5. Typical I
5
4
3
2
1
0
3
2
1
0
2.5
3
2
1
0
Figure 6. Typical LED to LED Current Matching at
2.5
2.5
3.0
3.0
3.0
OUT
3.5
3.5
3.5
V
Iout drift versus Vbat
Iref = 100 mA
Maximum
BAT
Tolerance as a Function of the
Low I
Iref = 5 mA
Vbat (V)
Supply
Vbat (V)
Vbat(V)
4.0
4.0
REF
4.0
4.5
4.5
4.5
-405C
255C
855C
Iout = 28mA
Iout = 80mA
NCP5604A, NCP5604B
5.0
5.0
5.0
-405C
255C
855C
http://onsemi.com
REF
5.5
5.5
5.5
9
LOAD CONNECTION
simultaneously, as depicted in Figure 1, but the load can be
arranged to accommodate one or two LED if necessary in
the application (see Figure 8). The four current mirror can
be connected in parallel to drive a single powerful LED,
thus yielding 100 mA current capability in a single LED.
NCP5604B version to make profit of the highest efficiency
(see Figure 9). In this case, LED4 is not connected and pin
5 is internally unconnected.
The NCP5604A chip is capable of driving the four LED
The applications using three LED shall use the
Figure 8. Typical Single and Double LED
12
12
8
7
6
5
8
7
6
5
Connections
GND
GND