AAT2803 Datasheet, PDF (4/16 Pages) Advanced Analogic Technologies – Six-Channel White LED Backlight Charge Pump with Flash

AAT2803
Six-Channel White LED Backlight
Charge Pump with Flash
Electrical Characteristics¹
V_IN = 3.6V, C_IN = C_OUT = C₁ = C₂ = C₃ = 1.0μF; T_A = -40°C to +85°C, unless otherwise noted.
Typical values are T_A = 25°C.
Symbol
V_IN
I_CC
I_SHDN
I_DX
I_(D-Match)
V_TH
V_OUT
I_OUT
T_SS
F_CLK
V_EN(L)
V_EN(H)
Description
Conditions
Min Typ Max Units
Operation Range
2.7
5.5 V
1X Mode, 3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current; EN/SET = V_IN;
EN_FL= GND
0.3 1
1.5X Mode, 3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current; EN/SET = V_IN;
EN_FL= GND
1.0 3.0
mA
Operating Current
2X Mode, 3.0 ≤ V_IN ≤ 5.5, Active,
No Load Current; EN/SET = V_IN;
EN_FL = GND
2.0 3.7
Shutdown Current
V_{OUT_FLASH} = 5V; EN/SET = GND;
EN_FL = V_IN
50μA Setting, 1X Mode; EN/SET
= V_IN; EN_FL = GND
EN/SET = 0
2.0 4.5
50
μA
1.0 μA
I_SINK Average Current Accuracy²
Current Matching Between Any
Two Current Sink Inputs^{3, 4}
I_SET = 30mA, T_A = 25°C
I_SET = 4.1mA, T_A = 25°C
V_F:D1:D4 = 3.6V
27 30 33
mA
3.69 4.1 4.51
0.5
%
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any D_X Pin
Output Voltage (Flash Charge
Pump)⁵
Max Continuous Output Current
(Flash Charge Pump)⁵
Max Pulsed Output Current⁵
Soft-Start Time
3.0< V_IN < 5V, I_OUT = 120mA;
EN_FL = V_IN
V_IN = 3.3V; V_OUT = 4.5V;
EN_FL = V_IN
V_IN = 3.6V; V_OUT = 4.5V;
I_PULSED = 250ms
Backlight Charge Pump
Flash Charge Pump
150
mV
4.3 4.5 4.7 V
120
mA
300
100
μs
200
Clock Frequency
1.0
MHz
Enable Threshold Low
Enable Threshold High
V_IN = 2.7V
V_IN = 5.5V
0.4 V
1.4
V
1. The AAT2803 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
2. Determined by the average of all active channels.
3. Current matching is defined as the deviation of any sink current from the average of all active channels.
4. Specification applies only to the tri-mode charge pump.
5. Specification applies only to the charge pump doubler.
4
2803.2006.12.1.6