LT3485EDD-0#TRPBF Analog Devices Integrated Circuit (Other) In Stock
The Analog Devices LT3485EDD-0#TRPBF is a photoflash capacitor charger IC with integrated IGBT gate drive, output voltage monitoring, and a 10-lead thin MSOP package with exposed heat-sink slug. It delivers high-efficiency boost conversion from a single-cell lithium or AA battery to the 300 V+ charge voltages required by xenon flash lamps in digital cameras and portable imaging systems.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- LT3485EDD-0#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.1300(MOQ 1)
- Temp Range
- ?°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3485EDD-0#TRPBF?
- Integrated IGBT gate driver eliminates external gate drive circuitry, enabling a complete single-cell photoflash charger solution with minimal external component count
- Built-in output voltage monitor allows the host MCU or ASIC to detect when the flash capacitor has reached its target charge voltage, enabling precise flash timing without external comparators
- 10-lead thin DFN/MSOP package with exposed heat-sink slug minimizes PCB footprint while improving thermal dissipation during the high-power boost switching cycle used to charge photoflash capacitors above 300 V
What is LT3485EDD-0#TRPBF used for?
The LT3485EDD-0#TRPBF is designed for the photoflash capacitor charger circuit in compact digital cameras, camera phones, and portable video recorders where the flash module must be recharged from a 1.5 V AA or 3.7 V Li-ion cell to voltages in the range of 300–360 V within a few seconds between shots. Its integrated IGBT drive and voltage monitor also make it suitable for portable medical strobe devices and industrial machine-vision illuminators that rely on xenon flash lamps. The thin package and minimal external component count allow the entire flash charger subsystem to fit within the tight spatial constraints of ultra-thin consumer imaging products.
What are the specifications of LT3485EDD-0#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1699 |
| YTEOL | 10 |
| Analog IC - Other Type | ANALOG CIRCUIT |
| JESD-30 Code | S-PDSO-N10 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 10V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LT3485EDD-0#TRPBF datasheet?
LT3485EDD-0#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3485EDD-0#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LT3485EDD-0#TRPBF support for photoflash capacitor charging?
The LT3485EDD-0#TRPBF is designed to operate from input voltages as low as 1 V (supporting a nearly depleted single AA alkaline cell) up to approximately 5.5 V, encompassing single-cell alkaline (1.5 V nominal), NiMH (1.2 V), and single-cell lithium-ion (3.0–4.2 V) batteries. This wide input range allows the flash charger to continue operating efficiently as the battery discharges through most of its usable capacity.
How does the integrated IGBT gate driver in the LT3485EDD-0#TRPBF reduce BOM complexity compared to a discrete photoflash charger design?
A conventional discrete photoflash charger requires a separate gate driver IC or a dedicated driver transistor stage to switch the IGBT (which controls energy transfer to the fly-back transformer), adding at least 2–4 extra components. The LT3485EDD-0#TRPBF integrates this gate drive function on-chip, so the entire charger circuit can be completed with just the IC, a fly-back transformer, a rectifier diode, and the storage capacitor—reducing BOM count by 3–5 parts and simplifying PCB layout in space-constrained camera modules.
What output voltage can the LT3485EDD-0#TRPBF charge a photoflash capacitor to, and how is the target voltage set?
The LT3485EDD-0#TRPBF charges photoflash capacitors to voltages typically in the range of 300–360 V, as required by xenon flash tubes commonly used in consumer cameras. The target output voltage is programmed by a resistor divider on the VMON (voltage monitor) pin; the charger stops switching when the divided-down output voltage matches an internal 1.23 V reference, allowing designers to set any charge voltage within the IC's rated output range by selecting appropriate resistor values.
How does the exposed heat-sink slug on the LT3485EDD-0#TRPBF package affect its thermal management during the fast-charge cycle?
During a photoflash capacitor charge cycle, the LT3485EDD-0#TRPBF can dissipate several hundred milliwatts in the package for several seconds. The exposed metal slug on the bottom of the 10-lead thin package conducts heat directly to the PCB copper pour, achieving a junction-to-board thermal resistance roughly 40–50% lower than an equivalent package without the slug. This allows the IC to sustain higher switching currents—and therefore faster capacitor recharge times—while keeping junction temperature below the 125°C maximum rating.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $4.3500 | $4.35 |
| 19+ | $4.1500 | $78.85 |
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