ADM8845ACPZ-REEL7 Analog Devices Inc, ADM8845ACPZ-REEL7 Datasheet - Page 8

• Manufacturer Part Number: ADM8845ACPZ-REEL7
• Description: IC, WHITE LED DRIVER CHARGE PUMP LFCSP16
• Manufacturer: Analog Devices Inc
• Type: Backlight, White LEDr

Specifications of ADM8845ACPZ-REEL7

• Led Driver Application: Cellular Phones, White LED Backlighting
• No. Of Outputs: 1
• Output Current: 30mA
• Output Voltage: 4.81V
• Input Voltage: 2.6V To 5.5V
• Topology: Charge Pump
• Constant Current: Yes
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight, Flash/Torch
• Type - Secondary: White LED
• Frequency: 200kHz
• Voltage - Supply: 2.6 V ~ 5.5 V
• Voltage - Output: 4.81V
• Mounting Type: Surface Mount
• Package / Case: 16-LFCSP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 88%
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ADM8845EB-EVALZ - BOARD EVALUATION FOR ADM8845
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: ADM8845ACPZ-REEL7

ADM8845
V
V
OUT
CC
Figure 16. Power Efficiency vs. Supply Voltage over Li-Ion Range,
Figure 17. Power Efficiency vs. Supply Voltage over Li-Ion Range,
90
85
80
75
70
65
60
55
50
45
40
90
85
80
75
70
65
60
55
50
45
40
1
2.8
2.8
2
CH1 20.0mV
2.9
2.9
Figure 15. 1× Mode Operating Waveforms
3.0
3.0
3.1
3.1
B
3.2
Four LEDS @ 15 mA/LED
3.2
W
Six LEDS @ 15 mA/LED
CH2
3.3
3.3
20.0mV
3.4
3.4
V
V
V
V
V
V
CC
CC
F
F
3.5
3.5
F
F
= 3.6V
= 3.2V
(V)
(V)
= 3.6V
= 3.2V
B
3.6
3.6
W
M 400ns CH1
3.7
3.7
3.8
3.8
3.9
3.9
V
V
V
F
F
F
V
V
V
F
F
F
= 3.8V
= 4.0V
= 4.3V
4.0
4.0
= 3.8V
= 4.0V
= 4.3V
4.1
4.1
220mV
4.2
4.2
Rev. C | Page 8 of 20
CTRL1/2
Figure 18. Power Efficiency vs. Supply Voltage over Li-Ion Range,
V
Figure 19. Power Efficiency vs. Supply Voltage over Li-Ion Range
OUT
90
85
80
75
70
65
60
55
50
45
40
90
85
80
75
70
65
60
55
50
45
40
2.8
1
2.8
2
CH1
2.9
2.9
2.00V
3.0
3.0
3.1
3.1
CH2 2.00V
3.2
Four LEDS @ 20 mA/LED
3.2
Six LEDS @ 20 mA/LED
Figure 20. TPC Delay
3.3
3.3
3.4
3.4
V
V
V
V
V
V
CC
CC
F
F
3.5
F
F
3.5
= 3.6V
= 3.2V
= 3.6V
= 3.2V
(V)
(V)
M10.0ms
3.6
3.6
: 44.0ms
@: –44.4ms
3.7
3.7
3.8
3.8
3.9
3.9
C2 FALL
200s
LOW SIGNAL
AMPLITUDE
V
V
V
V
V
V
CH2
F
F
F
F
F
F
4.0
4.0
= 3.8V
= 4.0V
= 4.3V
= 3.8V
= 4.0V
= 4.3V
4.1
4.1
4.36V
4.2
4.2