ADM8845ACPZ-REEL7 Analog Devices Inc, ADM8845ACPZ-REEL7 Datasheet - Page 5

• 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

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
1
2
3
4 to 9
10
11
12
13
14
15
16
-
Pin No.
Mnemonic
V
C2+
I
FB1 to FB6
GND
C2−
CTRL2
CTRL1
C1−
V
C1+
EP
SET
OUT
CC
Function
Charge Pump Output. A 2.2 µF capacitor to ground is required on this pin. Connect V
the LEDs.
Flying Capacitor 2 Positive Connection.
Bias Current Set Input. The current, I
current. Connect R
LED1 to LED6 Cathode Connection and Charge Pump Feedback. The current, I
times the current flowing through resistor, R
or connected to GND.
Device Ground Pin.
Flying Capacitor 2 Negative Connection.
Digital Input. 3 V CMOS Logic. Used with CTRL1 to control the shutdown operation of the main and sub LEDs.
Digital Input. 3 V CMOS Logic. Used with CTRL2 to control the shutdown operation of the main and sub LEDs.
Flying Capacitor 1 Negative Connection.
Positive Supply Voltage Input. Connect this pin to a 2.6 V to 5.5 V supply with a 4.7 µF decoupling capacitor.
Flying Capacitor 1 Positive Connection.
Exposed Paddle. Connect the exposed paddle to GND.
SET
to GND to set the bias current as V
V
NOTES
1. CONNECT EXPOSED PADDLE TO GND.
C2+
I
FB1
OUT
SET
1
2
3
4
Figure 2. Pin Configuration
Rev. C | Page 5 of 20
(Not to Scale)
ADM8845
TOP VIEW
SET
PIN 1
INDICATOR
, flowing through the resistor, R
SET
. When using fewer than six LEDs, this pin can be left unconnected
12 CTRL2
11 C2–
10 GND
9 FB6
SET
/R
SET
. Note that V
SET
, is gained up by 120 to give the I
SET
= 1.18 V.
SET
, flowing in these LEDs is 120
OUT
to the anodes of all
ADM8845
LED