LT3650EDD-8.4#PBF Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
LT3650EDD-8.4#PBF is a high-voltage monolithic linear Li-Ion battery charger delivering up to 2 A charge current with a fixed 8.4 V float voltage for 2-series-cell packs, housed in a 12-lead DFN package. It accepts a wide input voltage range and provides adjustable charge termination for flexible battery management. Ideal for industrial handheld devices, medical instruments, and portable power systems requiring a robust, single-chip 2-cell Li-Ion charging solution.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 12
- Lifecycle
- ACTIVE
- Datasheet
- LT3650EDD-8.4#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.3566(MOQ 10)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2 A maximum charge current with fixed 8.4 V float voltage optimized for 2-series-cell Li-Ion packs
- High-voltage monolithic design supporting wide input range above 8.4 V for adapter or solar panel inputs
- Adjustable charge threshold for flexible charge termination tuning without external microcontroller supervision
- Compact 12-lead DFN package minimizing PCB area in portable industrial and medical charging designs
Applications
The LT3650EDD-8.4#PBF provides a complete 2-series-cell Li-Ion charging front-end for portable industrial instruments, handheld medical devices, and ruggedized field equipment. Its 2 A charge rate and 8.4 V float voltage enable fast, safe charging of dual-cell 7.4 V nominal battery packs from standard AC adapters or high-voltage solar inputs. The single-IC linear charger architecture reduces BOM complexity and EMI compared to switch-mode alternatives, making it attractive for noise-sensitive medical and precision measurement equipment.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1725 |
| YTEOL | 9 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | S-PDSO-N12 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| 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) | 32V |
| Supply Voltage-Min (Vsup) | 9V |
| Supply Voltage-Nom (Vsup) | 20V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.45mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## LT3650EDD-8.4#PBF Alternates Showing results | Image |
| Package | Small Outline No-lead |
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 | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LT3650EDD-8.4#PBF:
suggested
Frequently Asked Questions
What is the float voltage and maximum charge current of the LT3650EDD-8.4#PBF, and which battery configuration does this target?
The LT3650EDD-8.4#PBF is factory-programmed to a fixed 8.4 V float voltage and delivers up to 2 A of charge current, which precisely matches the fully charged voltage of a 2-series-cell lithium-ion battery pack with a 7.4 V nominal voltage. This makes it a drop-in single-chip charger for dual-cell packs used in handheld instruments and portable medical devices.
Why would a designer choose the linear architecture of the LT3650EDD-8.4#PBF over a switching charger for medical equipment?
The LT3650EDD-8.4#PBF uses a linear (non-switching) charge topology, which generates no high-frequency switching noise that could interfere with sensitive analog measurement circuits or radio receivers in medical instruments. The tradeoff is higher power dissipation compared to a switch-mode design at 2 A charge current, but this is acceptable in medical equipment where EMI compliance margins are critical and thermal dissipation can be managed with the DFN exposed pad.
How does the adjustable charge threshold feature of the LT3650EDD-8.4#PBF benefit custom battery pack designs?
The LT3650EDD-8.4#PBF includes an adjustable threshold pin that allows designers to tune the charge termination or input current limit using external resistors, without requiring a microcontroller or fuel gauge IC. This programmability accommodates battery packs with slightly different capacity or chemistry specifications than the nominal 2-cell Li-Ion configuration, reducing the need for firmware changes when qualifying alternative battery suppliers.
What is the package type of the LT3650EDD-8.4#PBF and how does the exposed pad affect thermal design?
The LT3650EDD-8.4#PBF uses a 12-lead DFN (Dual Flat No-lead) package with an exposed thermal pad on the bottom, which must be soldered to a PCB copper pour to dissipate heat during 2 A charging. Since the linear charger drops voltage across the internal pass element, proper thermal design of the copper pour and any heatsinking vias is required to keep the junction temperature below the maximum rated limit when charging from a high input voltage such as 12 V.
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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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