ADM8845 Analog Devices, ADM8845 Datasheet - Page 4

• Manufacturer Part Number: ADM8845
• Description: Charge Pump Driver for 6 White LED LCD Backlights
• Manufacturer: Analog Devices

Specifications of ADM8845

• Vin Range: 2.6 to 5.5V
• Vout (v): Vin to 5.5
• Synchronous: No
• Package: 16-Lead LFCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: No
• Max Iout (ma): 30mA
• Brightness Control: PWM
• Peak Efficiency (%): 88%
• Switching Frequency: 1.5MHz

ADM8845
ABSOLUTE MAXIMUM RATINGS
T
Table 2.
Parameter
Supply Voltage, V
I
CTRL1, CTRL2
V
Feedback Pins FB1 to FB6
Operating Temperature Range
V
Storage Temperature Range
Power Dissipation
ESD Class
1
2
3
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
SET
Short through LED.
LED current should be derated above T
Based on long-term current density limitations.
OUT
OUT
A
Six LEDs Enabled with 30 mA/LED
Six LEDs Enabled with 20 mA/LED
= 25°C, unless otherwise noted.
3
Shorted
1
CC
A
> 65°C, refer to Figure 21.
2
2
Rating
–0.3 V to +6.0 V
–0.3 V to +2.0 V
–0.3 V to +6.0 V
Indefinite
–0.3 V to +6.0 V
–40°C to +65°C
–40°C to +85°C
180 mA
–65°C to +125°C
2 mW
1
Rev. C | Page 4 of 20
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL CHARACTERISTICS
16-Lead LFCSP Package:
θ
JA
= 50°C/W