LTC3220EPF#PBF Linear Technology, LTC3220EPF#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC3220EPF#PBF
• Description: IC LED DRVR QVGA DISPLAY 28UTQFN
• Manufacturer: Linear Technology
• Type: QVGA Display (I²C Interface)r

Specifications of LTC3220EPF#PBF

• Topology: Open Drain, Step-Up (Boost), Switched Capacitor (Charge Pump)
• Number Of Outputs: 18
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: LED Blinker
• Frequency: 850kHz ~ 1.05MHz
• Voltage - Supply: 2.9 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 28-UTQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 20mA
• Internal Switch(s): Yes
• Efficiency: 91%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

PIN FUNCTIONS
SDA (Pin 12): Input Data for the Serial Port. Serial data is
shifted in one bit per clock cycle to control the LTC3220/
LTC3220-1. The logic level is referenced to DV
C1P , C2P , C1M, C2M (Pins 27, 26, 23, 22): Charge Pump
Flying Capacitor Pins. A 2.2μF X7R or X5R ceramic ca-
pacitor should be connected from C1P to C1M and C2P
to C2M.
V
must be bypassed with a single 2.2μF low ESR ceramic
capacitor.
BLOCK DIAGRAM
IN
(Pin 24): Supply Voltage for the Entire Device. This pin
24
10
25
12
11
V
DV
RST
SDA
SCL
IN
CC
21
ULED18
20
ULED17
+
–
19
ULED16
CC
1.22V
SHIFT REGISTER
MASTER/SLAVE
OSCILLATOR
18
.
CONTROL
ULED15
850kHz
LOGIC
REG
17
ULED14
RST (Pin 25): Active Low Reset Input. RST Resets all
internal registers and forces LTC3220/LTC3220-1 into
shutdown mode.
CPO (Pin 28): Output of the Charge Pump. Used to power
all LEDs. A 4.7μF X5R or X7R ceramic capacitor should
be connected to ground.
Exposed Pad (Pin 29): Ground. The Exposed Pad must
be soldered to PCB ground.
16
ULED13
27
C1P
15
ULED12
CHARGE PUMP
23
CURRENT SOURCES
C1M
18 UNIVERSAL
AND DACS
14
ULED11
26
LTC3220/LTC3220-1
C2P
13
22
ULED10
C2M
18
9
ULED9
EXPOSED
ULED1
ULED2
ULED3
ULED4
ULED5
ULED6
ULED7
ULED8
PAD
CPO
3220 BD
29
28
1
2
3
4
5
6
7
8
32201fc
7