RT9379 RICHTEK [Richtek Technology Corporation], RT9379 Datasheet - Page 4

• Manufacturer Part Number: RT9379
• Description: 6 Channels 150mA x1/x1.5/x2 Charge Pump White LED Driver
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9379
Electrical Characteristics
(V
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
Note 2. θ
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
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4
Input Power Supply
Input Supply Voltage
Under-Voltage Lockout
Threshold
Under-Voltage Lockout
Hysteresis
Quiescent Current
Shutdown Current
LED Current
LED Current Accuracy
Current Matching
Charge Pump
Oscillator Frequency
PWM Dimming Frequency
Internal CF Resistance
Mode Decision
x1 Mode to x1.5 Mode
Transition Voltage (V
Mode Transition Hystersis
Protection
OVP
Enable
EN Low Time for Shutdown
EN Threshold
Voltage
EN Pull Low Current
IN
= 3.6V, V
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
JEDEC 51-7 thermal measurement standard. The case point of θ
JA
is measured in the natural convection at T
Parameter
F
= 3.5V, C
Logic-Low
Logic-High
IN
IN
= C
Falling)
OUT
= 1uF, C
V
V
ΔV
I
I
I
f
V
V
Symbol
Q
SHDN
LEDx
OSC
IN
UVLO
IL
IH
UVLO
FLY1
= C
FLY2
V
x1 Mode
V
I
I
I
I
V
LEDx
LEDx
OUT
OUT
IN
IN
IN
A
= 1μF, I
= 25°C on a high effective four layers thermal conductivity test board of
Rising
= 4.5V
– V
= 150mA, I
= 150mA, I
= 25mA
= 25mA
OUT
Test Conditions
LED1 to LED6
LEDx
LEDx
= 25mA, T
= 25mA.
= 25mA.
JC
is on the exposed pad for the package.
A
= 25°C, unless otherwise specified)
Min
2.8
1.8
4.5
−5
−2
--
--
--
--
--
--
--
--
--
1
3
1
1000
3.65
Typ
100
160
200
0.4
--
--
--
--
--
2
1
0
0
5
2
DS9379-01 April 2011
Max
200
4.5
2.5
3.8
5.5
0.2
4.5
+5
+2
--
--
--
--
--
--
2
2
Units
kHz
kHz
mV
mA
mV
ms
μA
kΩ
μA
%
%
V
V
V
V
V
V