PCA9922PW,118 NXP Semiconductors, PCA9922PW,118 Datasheet - Page 36

• Manufacturer Part Number: PCA9922PW,118
• Description: IC LED DRIVER LINEAR 16-TSSOP
• Manufacturer: NXP Semiconductors
• Type: Linear (Serial Interface)r

Specifications of PCA9922PW,118

• Package / Case: 16-TSSOP
• Constant Current: Yes
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: General Purpose
• Type - Secondary: Color
• Frequency: 25MHz
• Voltage - Supply: 3.3 V ~ 5.5 V
• Voltage - Output: 5.5V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 60mA
• Internal Switch(s): Yes
• Low Level Output Current: 19.5 mA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 485 mA
• Maximum Power Dissipation: 0.25 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Topology: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4775-2

Charge Pump versus Inductor Boost
Feature
Extra external
components
Efficiency
Drive single LED
Drive multiple
LED in series on
same output
More Features
* One additional rectifying diode is required for asynchronous converter
Inductor boost converter that extends battery life in flash or video mode, is critical for high performance
camera phone
Driving single and multiple LED allows one inductor boost converter to use across multiple platforms
Having multiple LEDs not only gives Xenon Flash physical resemblance, but driving them by one output
allows inductor boost converter provides more and uniform output light, resulting in high quality picture
capacitor
Fly back
Charge
Pump
LOW
YES
NO
NO
Inductor
Inductor*
Boost
HIGH
YES
YES
YES
Inductor size is large, but PCB area is primarily dominated by the size
of the LED layout area
Extend battery life that is critical in camera phone
multiple platforms
resemblance, but driving them by one output provides more and uniform
output light, resulting in taking high quality picture
push application such as downloading email
Driving single and multiple LED allows a single device to use across
Having multiple LEDs not only gives Xenon Flash physical
TX_MASK reducing output current, prevents over-draining battery in
Separate LED indictor output for video-on
SSL3250A & SSL3252
Comments about Inductor Boost
91