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ADD5205ACPZ-RL

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
ADD5205 Data Sheet
Rev. 0 | Page 6 of 16
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter Rating
VIN −0.3 V to +20 V
SW −0.3 V to +32 V
SHDN,
−0.3 V to +7 V
ISET, C_FILTER −0.3 V to +3.6 V
PWM −0.3 V to +7 V
FB1, FB2, FB3, FB4 −0.3 V to +32 V
OVP −0.3 V to +32 V
Maximum Junction Temperature (T
J
max) 150°C
Operating Temperature Range (T
A
) −25°C to +85°C
Storage Temperature Range (T
S
) −65°C to +150°C
Reflow Peak Temperature (20 sec to 40 sec) 260°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θ
JA
is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 4. Thermal Resistance
Package Type θ
JA
θ
JC
Unit
12-Lead LFCSP 41.6 7.65 °C/W
ESD CAUTION
Data Sheet ADD5205
Rev. 0 | Page 7 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VIN
SHDN
NOTES
1. CONNECT THE EXPOSED PADDLE TO GROUND.
GND
FB4
C_FILTER
ISET
SW
OVP
PW
M
FB1
FB2
FB3
(Not to Scale)
09858-002
9
8
7
1
2
3
4
5
6
12
11
10
TOP
VIEW
ADD5205
Figure 3. Pin Configuration
Table 5. Pin Function Descriptions
Pin
No. Mnemonic Description
1 VIN Supply Input Pin. Bypassed with a capacitor to ground.
2
SHDN
Shutdown Control Pin for Enabling IC. Active low.
3 GND Ground Pin.
4 SW Drain Connection of the Internal Power FET Pin.
5 OVP
Overvoltage Protection Sense Input Pin. Must be locally bypassed with a 100 nF capacitor and placed as close as
possible to the IC.
6 PWM PWM Signal Input Pin.
7 ISET Full-Scale LED Current Set Pin. A resistor from this pin to ground sets the LED current up to 25 mA.
8 C_FILTER
Filtered PWM Signal Output Pin. Connect a capacitor between C_FILTER and ground. This capacitor forms a low-pass
filter with an internal resistor.
9 FB4
Regulated Current Sink Input Pin. Connect the bottom cathode of the LED string to this pin. If unused, connect FB4
to ground.
10 FB3
Regulated Current Sink Input Pin. Connect the bottom cathode of the LED string to this pin. If unused, connect FB3
to ground.
11 FB2
Regulated Current Sink Input Pin. Connect the bottom cathode of the LED string to this pin. If unused, connect FB2
to ground.
12 FB1
Regulated Current Sink Input Pin. Connect the bottom cathode of the LED string to this pin. This channel should be
connected to LEDs as a default channel.
EPAD Connect the exposed paddle to ground.
ADD5205 Data Sheet
Rev. 0 | Page 8 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
0
10
20
30
40
50
60
70
80
90
100
0510
INPUT VOLTAGE (V)
BOOST CONVERTER EFFICIENCY (%)
15 20
0
9858-004
0
5
10
LED CURRENT (mA)
15
20
25
0510
INPUT VOLTAGE (V)
15 20
09858-007
Figure 4. Boost Converter Efficiency vs. Input Voltage,
I
LED
= 20 mA, Brightness = 100%, and LEDs = 6 Series × 4 Parallel
Figure 7. LED Current vs. Input Voltage (I
LED
= 22 mA)
0
5
10
LED CURRENT (mA)
15
25
20
30
0 400 800
R
SET
(kΩ)
1200
1400200 600 1000 1600
09858-005
–20
–15
–10
–5
0
5
10
15
20
02040
PWM INPUT DUTY CYCLE (%)
LED CURRENT M
A
TCHING (%)
60 80 100
09858-008
Figure 8. LED Current Matching vs. PWM Input Duty Cycle
Figure 5. LED Current (I
LED
) vs. R
SET
09858-009
V
IN
= 3.7V
BRIGHTNESS = 100% 6 SERIES x 4 PARALLEL
A CH3 960mV
1
2
4
3
V
OUT
(10V/DIV)
SHDN (3V/DIV)
I
L
(500mA/DIV)
V
SW
(10V/DIV)
0
20
18
16
14
12
10
LED CURRENT (mA)
8
6
4
2
0
20 40
PWM INPUT DUTY CYCLE (%)
60 80 100
09858-006
Figure 6. LED Current vs. PWM Input Duty Cycle
Figure 9. Start-Up Waveforms (Brightness = 100%)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

ADD5205ACPZ-RL

Mfr. #:
Buy ADD5205ACPZ-RL
Manufacturer:
Analog Devices / Linear Technology
Description:
LED Lighting Drivers LPL White LED Driver for Notebook
Lifecycle:
New from this manufacturer.
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