AOZ1950 Datasheet, PDF (3/14 Pages) Alpha & Omega Semiconductors – Boost Regulator White LED Driver

AOZ1950
Absolute Maximum Rating
Exceeding the Absolute Maximum Ratings may damage
the device
Parameter
Rating
VIN to AGND
-0.3V to +6V
LX, VOUT to AGND
-0.3V to +60V
DIM, EN, FB, COMP, IND
VIN +0.3V
PGND to AGND
-0.3V to +0.3V
Storage Temperature (T_S)
ESD Rating⁽¹⁾
-65°C to +150°C
2kV
Note:
1. Devices are inherently ESD sensitive, handling
precautions are required. Human body model rating:
1.5kΩ in series with 100pF.
Maximum Operating Ratings
The device is not guaranteed to operate beyond the
Maximum Operating Ratings.
Parameter
Rating
Supply Voltage (V_IN)
Ambient Temperature (T_A)
Package Thermal Resistance
3x3 DFN-10 (Θ_JA)
2.7V to 5.5V
-40°C to +85°C
40°C/W
Electrical Characteristics
T_A = 25°C, V_IN = 3.3V, unless otherwise specified.
Symbol
Parameter
V_VIN
VIN Supply Voltage
V_VIN__UVLO VIN UVLO Threshold
V_VIN__HYS
VIN UVLO Hysteresis
I_VIN__ON
VIN Quiescent Current
I_VIN__OFF
VIN Shutdown Current
V_FB
FB Regulation Voltage
I_FB
FB Input Bias Current
T_OFF
OFF Pulse Time
T_SS
Soft-Start Time
POWER SWITCH
R_{NMOS_ON} NMOS On Resistance
I_{NMOS_OFF} NMOS Leakage Current
R_{PMOS_ON} PMOS On Resistance
PROTECTIONS
I_LIM
Current Limit
V_{VOUT_OVP} OVP Threshold
V_{VOUT_HYS} OVP Threshold Hysteresis
T_SD
Thermal Shutdown Threshold
T_{SD_HYS}
Thermal Shutdown Hysteresis
LOGIC INPUTS
V_{EN_HIGH}
V_{EN_LOW}
F_{PWM_DIM}
EN Logic High Threshold
EN Logic Low Threshold
PWM Dimming Frequency
Range
Condition
VIN rising
EN = VIN
EN = GND
EN = VIN
FB = 250mV
VIN = 4.2V, VOUT = 30V
Number of LEDs = 6
EN = VIN, I_NMOS = 500mA
EN = GND, LX = 60V
EN = VIN, I_PMOS = 500mA
VOUT Rising
Temperature Rising
Enable Rising
Min.
2.7
285
Typ.
200
300
150
2
Max.
5.5
2.6
1.5
1
315
200
Units
V
V
mV
mA
μA
mV
nA
ns
ms
0.35 0.55
Ω
2
μA
0.45 0.65
Ω
0.75 1.1 1.35
A
49
53
57
V
4
V
145
°C
35
°C
1.5
V
0.4
V
0.2
1
kHz
Rev. 1.0 January 2010
www.aosmd.com
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