RT9378 RICHTEK [Richtek Technology Corporation], RT9378 Datasheet - Page 3

• Manufacturer Part Number: RT9378
• Description: 4 CHs 100mA x1/x1.5/x2 Charge Pump White LED Driver
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
DS9378-03 April 2011
Input Power Supply
Input Supply Voltage
Under-Voltage Lockout
Threshold
Under-Voltage Lockout
Hysteresis
Quiescent Current
Shutdown Current
LED Current
I
Current Matching
Charge Pump
Oscillator Frequency
PWM Dimming Frequency
Mode Decision
x1 Mode to x2 Mode
Transition Voltage (V
Mode Transition Hystersis
Protection Function
OVP
WQFN-12L 2x2 ------------------------------------------------------------------------------------------------------------ 0.606W
Supply Input Voltage, V
Output Voltage, V
Package Thermal Resistance (Note 2)
WQFN-12L 2x2, θ
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C
IN
LEDx
Power Dissipation, P
= 3.6V, V
Accuracy
Parameter
F
= 3.5V, C
OUT
JA
------------------------------------------------------------------------------------------------------- 165°C/W
IN
IN
D
----------------------------------------------------------------------------------------------------- −5V to 0.3V
= C
@ T
Falling)
IN
------------------------------------------------------------------------------------------------ −0.3V to 5V
OUT
A
= 25°C
= 1μF, C
V
V
ΔV
I
I
f
Symbol
Q
SHDN
OSC
IN
UVLO
UVLO
FLY1
= C
(Note 1)
FLY2
V
x1 Mode
V
I
I
Minimum Turn On > 20μs
I
I
V
LEDx
LEDx
OUT
OUT
IN
IN
IN
= 0.22μF, I
Rising
= 4.5V
– V
= 100mA, I
= 100mA, I
= 25mA
= 25mA
OUT
Test Conditions
(Note 4)
LED1 to LED4
LEDx
LEDx
= 25mA
= 25mA
= 15mA, T
A
= 25°C, unless otherwise specified)
Min
2.8
1.8
−5
−2
--
--
--
--
1
--
--
--
Typ
100
200
0.4
3.6
--
--
2
1
0
0
1
5
RT9378
To be continued
www.richtek.com
Max
4.5
2.5
3.8
--
2
2
5
2
--
4
--
--
MHz
Unit
kHz
mV
mA
mV
μA
%
%
V
V
V
V
3