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Analog Devices Inc. LT1510IGN#TRPBF
- Part No.:
- LT1510IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1510IGN#TRPBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,459
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Product details
Overview
LT1510IGN#TRPBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current step-down battery charger IC designed for lithium-ion, NiCd, and NiMH batteries. It integrates a 1.5A DC/2A peak internal NPN switch, 0.1Ω onboard current-sense resistor, and 0.5% precision voltage reference. Operating from 8V–28V input, it delivers up to 1.5A charging current with 200kHz switching frequency and supports ground-referenced battery sensing - used in portable medical devices, industrial handhelds, and backup power systems.
For engineers reviewing the LT1510IGN#TRPBF datasheet, LT1510IGN#TRPBF pinout, LT1510IGN#TRPBF application, or LT1510IGN#TRPBF equivalent, key selection criteria include its 16-pin GN (SSOP) thermal package (θJA = 80°C/W), programmable charging current via single resistor (±3% typical accuracy), OVP-controlled CV mode for Li-ion float regulation, and shutdown control via VC pin.
Technical Context
The LT1510IGN#TRPBF implements current-mode PWM control with dual amplifiers: CA1 converts battery current through an internal 0.1Ω sense path into a proportional IPROG current (500µA/A), while CA2 compares IPROG against PROG-set reference to regulate duty cycle. Its 200kHz oscillator drives a saturating NPN switch with BOOST-assisted gate drive, enabling high efficiency (>87% at 1.3A) and small external inductor size.
It features integrated voltage amplifier (VA) for OVP feedback with 2.465V threshold, allowing precise constant-voltage termination for Li-ion cells. The VC pin serves as inner-loop control node (0.7V startup, 1.1V full current) and enables soft-start (via 0.1µF capacitor) and active shutdown - all without requiring external charge termination circuitry for lithium chemistries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charging Current Accuracy | ±3% typical - ensures reliable CC phase duration and avoids overcharge risk in Li-ion applications. |
| Reference Voltage Accuracy | ±0.5% at 25°C - meets critical ±1% Li-ion float voltage tolerance when combined with 0.25% external resistors. |
| Switch Current Rating | 1.5A DC / 2A peak - supports fast-charging of 2–20V battery packs up to ~30W output power. |
| Switching Frequency | 200kHz - balances efficiency, EMI, and inductor size; enables use of compact 10–33µH surface-mount chokes. |
| Battery Voltage Range | 2V to 20V - covers single-cell Li-ion (4.2V), multi-cell NiMH/NiCd stacks, and 12V sealed lead-acid backup systems. |
| Quiescent Drain Current | 3µA sleep mode - prevents battery depletion when wall adapter is disconnected. |
| Thermal Resistance | θJA = 80°C/W (GN package) - requires minimal PCB copper area for thermal management at full load. |
Pinout & Package
LT1510IGN#TRPBF is housed in a 16-lead plastic SSOP (GN) package with fused corner pins connected to the die attach paddle for enhanced thermal dissipation. Four corner GND pins must be soldered to expanded PCB lands to achieve rated θJA = 80°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 15, 16) | Power and signal ground reference | Fused corner pins provide low-impedance thermal path; must connect to large copper pour for heat sinking. |
| SW (Pin 2) | Switch output node | Drives external Schottky catch diode; layout must minimize trace inductance to reduce switching losses and EMI. |
| BOOST (Pin 3) | Bootstrap supply for NPN switch driver | VBOOST = VCC + VBAT during conduction; max 55V rating allows wide input–battery differential. |
| SENSE (Pin 5) | Current-sense amplifier input | Connects to low-side of internal 0.1Ω sense resistor; enables battery-negative-ground configuration. |
| VCC (Pins 6, 11, 12) | IC supply input | Accepts 8–28V; undervoltage lockout engages below 7V; all VCC pins must be shorted near device. |
| PROG (Pin 7) | Charging current programming node | Accepts resistor-to-GND or DAC sink current; sets IBAT = (2.465V / RPROG) × 2000 with ±3% accuracy. |
| VC (Pin 8) | Inner-loop PWM control voltage | 0.7V startup threshold; 0.1µF capacitor enables soft-start; pulled low to shut down switching. |
| BAT (Pin 9) | Current-sense amplifier input | Completes sense path across internal resistor; allows direct connection to battery negative terminal. |
| OVP (Pin 10) | Voltage amplifier input for CV regulation | Compares battery voltage (via R3/R4 divider) against 2.465V reference; reduces current when threshold reached. |
| NC (Pins 13, 14) | No-connect terminals | Not internally bonded; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A switch + 0.1Ω sense resistor | Eliminates external MOSFET and discrete sense resistor, reducing BOM count and layout complexity. |
| Ground-referenced battery sensing | Enables direct BAT–GND connection - simplifies PCB routing and avoids level-shifting circuitry. |
| 0.5% voltage reference with OVP amplifier | Supports ±1% Li-ion float voltage accuracy using standard 0.25% external resistors (R3/R4). |
| 3µA sleep-mode current drain | Prevents battery self-discharge when input is removed - critical for long-term storage in portable equipment. |
| VC pin soft-start and shutdown control | 0.1µF capacitor sets 3ms current ramp-up; logic-level pull-down disables switching without external logic. |
Applications
| Lithium-Ion Portable Medical Devices | Industrial Handheld Data Collectors |
|---|---|
|
Use Scenario: Charging sealed 3.7V/2600mAh Li-ion packs in battery-powered ECG monitors and infusion pumps. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger IC managing full-charge cycle without external termination logic. Use Value: 0.5% reference accuracy and integrated sense resistor ensure safe, repeatable 4.2V float voltage - extending cell cycle life beyond 500 cycles. |
Use Scenario: Fast-charging 7.4V dual-cell Li-ion batteries in ruggedized barcode scanners and RFID readers. IC Role / Device Role / Timing Role: Step-down battery charger with programmable 1.3A CC current and automatic CV transition. Use Value: 200kHz switching enables use of 10µH ceramic inductors under 2.2mm height - meeting strict mechanical envelope requirements. |
| NiMH/NiCd Backup Power Systems | Emergency Lighting Battery Packs |
|
Use Scenario: Charging 9.6V NiMH packs in uninterruptible power supplies for network edge routers. IC Role / Device Role / Timing Role: Adjustable-current charger supporting 0.5A fast-charge and 50mA trickle modes via PWM-programmed PROG pin. Use Value: Dual-level current control eliminates need for separate termination ICs - reducing cost and board space by >30%. |
Use Scenario: Maintaining 12V sealed lead-acid or NiCd emergency lighting batteries in commercial buildings. IC Role / Device Role / Timing Role: Constant-voltage regulator with OVP feedback loop holding battery at 13.8V float voltage. Use Value: 3µA sleep current prevents standby discharge - ensuring >95% state-of-charge after 6 months of grid outage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1510CS8#TRPBF | 8-pin SO package, θJA = 125°C/W, no OVP pin (requires external VA), same 200kHz frequency | Limited to lower-power designs (<0.8A thermally constrained); lacks integrated OVP amplifier for Li-ion CV mode | Select only if space-constrained and CV regulation is handled externally; not drop-in for LT1510IGN#TRPBF. |
| LT1510-5IGN#TRPBF | Same GN package but 500kHz switching frequency, 77–81% max duty cycle, higher boost current demand | Enables smaller inductors (e.g., 4.7µH) but reduces max input–battery differential; requires tighter layout for EMI | Choose for ultra-compact designs where inductor height <1.8mm is mandatory; verify thermal margin at full load. |
Compared with LT1510CS8#TRPBF, the LT1510IGN#TRPBF provides integrated OVP functionality and superior thermal performance for sustained 1.5A charging; versus LT1510-5IGN#TRPBF, it offers higher duty cycle and relaxed EMI filtering requirements at the cost of larger magnetics.
Availability
LT1510IGN#TRPBF is available at Aetrix Electronics and suitable for portable medical devices, industrial handhelds, and emergency lighting systems requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance across –40°C to 85°C industrial temperature range.
Supply support for LT1510IGN#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear ICs including the LT1510 family.
The LT1510 product line was engineered specifically for high-efficiency, single-chip battery charging in space- and cost-constrained portable systems - emphasizing integration of power switch, sense, reference, and control loops without external termination components.
FAQ
What is the maximum continuous charging current supported by the LT1510IGN#TRPBF?
The LT1510IGN#TRPBF supports up to 1.5A DC charging current under thermally optimized conditions (TA ≤ 60°C, θJA = 80°C/W). At 25°C ambient, derating curves show 1.5A is sustainable up to 16V battery voltage; above that, current must be reduced to maintain TJ ≤ 125°C. Peak switch current capability remains 2A regardless of thermal condition.
Does the LT1510IGN#TRPBF require external charge termination circuitry for lithium-ion batteries?
No - the LT1510IGN#TRPBF does not require external charge termination for lithium-ion batteries. Its integrated 0.5% voltage reference and OVP amplifier enable precise constant-voltage regulation at 4.2V (or other setpoints via R3/R4), automatically tapering current to zero as the battery reaches full charge. This eliminates the need for dV/dt or temperature-based termination circuits.
How is charging current programmed on the LT1510IGN#TRPBF?
Charging current on the LT1510IGN#TRPBF is programmed by connecting a single resistor (RPROG) between the PROG pin and ground. The relationship is IBAT = (2.465V / RPROG) × 2000. For example, a 4.93kΩ resistor sets 1.0A ±3% typical accuracy. Alternatively, a microprocessor DAC can sink current into PROG, provided it supports ≥2.5V compliance and ≥1mA sink capability.
Can the LT1510IGN#TRPBF charge batteries with the negative terminal grounded?
Yes - the LT1510IGN#TRPBF supports true ground-referenced battery sensing. The SENSE and BAT pins connect across the internal 0.1Ω resistor, allowing the battery's negative terminal to tie directly to system ground. This eliminates level-shifting requirements and simplifies PCB layout compared to high-side sensing architectures.
What is the purpose of the VC pin on the LT1510IGN#TRPBF?
The VC pin on the LT1510IGN#TRPBF serves three functions: (1) inner-loop PWM control voltage (0.7V startup, 1.1V full current), (2) soft-start node (0.1µF capacitor ramps VC to control current rise time), and (3) shutdown input (pulling VC <0.8V disables switching). During normal operation, VC reflects real-time current demand and enables precise analog control of charge rate.
LT1510IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- -
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Voltage
- Charge Current - Max:
- 1.5A
- Battery Pack Voltage:
- 20V (Max)
- Voltage - Supply (Max):
- 28V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT1510IGN#TRPBF FAQ
1.How can I place an order for LT1510IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510IGN#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1510IGN#TRPBF reliable?
The price and inventory of LT1510IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1510IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510IGN#TRPBF?
LT1510IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510IGN#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1510IGN#TRPBF?
For technical support, including LT1510IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510IGN#TRPBF requirements.
6.How does Aetrix verify that LT1510IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1510IGN#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1510IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1510IGN#TRPBF?
All LT1510IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510IGN#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1510IGN#TRPBF part is unused and in its original packaging.
Return procedure for LT1510IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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