Datasheet AL3644 (Diodes) - 5
| Manufacturer | Diodes |
| Description | Dual 1.5A Current Source Camera Flash LED Driver |
| Pages / Page | 23 / 5 — AL3644. Electrical Characteristics. Symbol. Parameter. Conditions. Min. … |
| File Format / Size | PDF / 805 Kb |
| Document Language | English |
AL3644. Electrical Characteristics. Symbol. Parameter. Conditions. Min. Typ. Max. Unit. CURRENT SOURCE. STEP-UP DC/DC CONVERTER
Model Line for this Datasheet
Text Version of Document
AL3644 Electrical Characteristics
(VIN=3.6V, VHWEN = VIN, TA= +25°C, unless otherwise specified.)
Symbol Parameter Conditions Min Typ Max Unit CURRENT SOURCE
VOUT=4V, –7% 1.5 7% A Flash Code=0x7F=1.5A Flash ILED1/2 Current Source Accuracy VOUT=4V, -10% 89.3 10% mA Torch Code=0x3F=89.3mA Torch V I OUT=4V, LED1/2 Current Source Accuracy (AL3644TT) -10% 180 10% mA Torch Code=0x3F=180mA Torch
T
LED1 and LED2 Current Source ILED1/2=729mA Flash — 290 — VHR mV
C
Regulation Voltage ILED1/2=179mA Torch — 158 —
U
LED1 and LED2 Current Source Torch and VHR ILED1/2=360mA — 270 — mV
D
Regulation Voltage (AL3644TT) Flash
O
On Threshold 4.6 4.75 4.85 VOVP Over Voltage Protection Threshold V
R
Off Threshold — 4.65 —
P STEP-UP DC/DC CONVERTER
IQ Quiescent Supply Current Device not Switching Pass Mode — 0.3 0.75 mA
W
Device Disabled, VHWEN = 0V
E
I — SD Shutdown Supply Current 0.1 4 μA 2.5V ≤ VIN ≤ 5V
N
Device Disabled, V I HWEN =1.8V SB Standby Supply Current — 2.5 10 μA 2.5V ≤ VIN ≤ 5V ƒSW Switching Frequency 2.5V ≤ VIN ≤ 5V -6% 4 6% MHz RPMOS PMOS Switch On-Resistance VIN = 3.6V — 86 — mΩ RNMOS NMOS Switch On-Resistance VIN = 3.6V — 65 — mΩ Reg 0x07, bit[0]=0 -12% 1.9 12% ICL Switch Current Limit A Reg 0x07, bit[0]=1 -12% 2.8 12% UVLO Under Voltage Lockout Threshold Falling VIN — 2.5 2.6 V VTRIP NTC Comparator Trip Threshold Reg 0x09, bits[3:1]='100' -5% 0.6 5% V INTC NTC Current -6% 50 6% μA Input Voltage Flash Monitor Trip VIVFM Reg 0x02, bits[5:3]='000' -3% 2.9 3% V Threshold
HWEN, TORCH/TEMP, STROBE, TX VOLTAGE
VIL Input Logic Low 0 — 0.4 V 2.5V ≤ VIN ≤ 5V VIH Input Logic High 1.2 — VIN V
I2C-COMPATIBLE INTERFACE (SCL, SDA)
VIL Input Logic Low 0 — 0.4 V 2.5V ≤ VIN ≤ 4.2V VIH Input Logic High 1.2 — VIN V VOL Output Logic Low ILOAD =3mA — — 400 mV
TIMING Requirements
t1 SCL Clock Period — 2.4 — — μs t2 Data In Set-Up Time to SCL High — 100 — — ns t3 Data Out Stable After SCL Low — 0 — — ns SDA Low Set-Up time to SCL Low t4 — 100 — — ns (Start) SDA High Hold time After SCL High t5 — 100 — — ns (Stop)
Figure 1. I2C-Compatible Interface Specifications
AL3644 5 of 23 July 2019 Document number: DS41558 Rev. 1 - 2
www.diodes.com
© Diodes Incorporated
(VIN=3.6V, VHWEN = VIN, TA= +25°C, unless otherwise specified.)
Symbol Parameter Conditions Min Typ Max Unit CURRENT SOURCE
VOUT=4V, –7% 1.5 7% A Flash Code=0x7F=1.5A Flash ILED1/2 Current Source Accuracy VOUT=4V, -10% 89.3 10% mA Torch Code=0x3F=89.3mA Torch V I OUT=4V, LED1/2 Current Source Accuracy (AL3644TT) -10% 180 10% mA Torch Code=0x3F=180mA Torch
T
LED1 and LED2 Current Source ILED1/2=729mA Flash — 290 — VHR mV
C
Regulation Voltage ILED1/2=179mA Torch — 158 —
U
LED1 and LED2 Current Source Torch and VHR ILED1/2=360mA — 270 — mV
D
Regulation Voltage (AL3644TT) Flash
O
On Threshold 4.6 4.75 4.85 VOVP Over Voltage Protection Threshold V
R
Off Threshold — 4.65 —
P STEP-UP DC/DC CONVERTER
IQ Quiescent Supply Current Device not Switching Pass Mode — 0.3 0.75 mA
W
Device Disabled, VHWEN = 0V
E
I — SD Shutdown Supply Current 0.1 4 μA 2.5V ≤ VIN ≤ 5V
N
Device Disabled, V I HWEN =1.8V SB Standby Supply Current — 2.5 10 μA 2.5V ≤ VIN ≤ 5V ƒSW Switching Frequency 2.5V ≤ VIN ≤ 5V -6% 4 6% MHz RPMOS PMOS Switch On-Resistance VIN = 3.6V — 86 — mΩ RNMOS NMOS Switch On-Resistance VIN = 3.6V — 65 — mΩ Reg 0x07, bit[0]=0 -12% 1.9 12% ICL Switch Current Limit A Reg 0x07, bit[0]=1 -12% 2.8 12% UVLO Under Voltage Lockout Threshold Falling VIN — 2.5 2.6 V VTRIP NTC Comparator Trip Threshold Reg 0x09, bits[3:1]='100' -5% 0.6 5% V INTC NTC Current -6% 50 6% μA Input Voltage Flash Monitor Trip VIVFM Reg 0x02, bits[5:3]='000' -3% 2.9 3% V Threshold
HWEN, TORCH/TEMP, STROBE, TX VOLTAGE
VIL Input Logic Low 0 — 0.4 V 2.5V ≤ VIN ≤ 5V VIH Input Logic High 1.2 — VIN V
I2C-COMPATIBLE INTERFACE (SCL, SDA)
VIL Input Logic Low 0 — 0.4 V 2.5V ≤ VIN ≤ 4.2V VIH Input Logic High 1.2 — VIN V VOL Output Logic Low ILOAD =3mA — — 400 mV
TIMING Requirements
t1 SCL Clock Period — 2.4 — — μs t2 Data In Set-Up Time to SCL High — 100 — — ns t3 Data Out Stable After SCL Low — 0 — — ns SDA Low Set-Up time to SCL Low t4 — 100 — — ns (Start) SDA High Hold time After SCL High t5 — 100 — — ns (Stop)
Figure 1. I2C-Compatible Interface Specifications
AL3644 5 of 23 July 2019 Document number: DS41558 Rev. 1 - 2
www.diodes.com
© Diodes Incorporated
