LTC4162IUFD-FAD#TRPBF - 35V 3.2A LiFePO4 Charger + PowerPath | ADI
부품 번호: LTC4162IUFD-FAD#TRPBF ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $6.98 | $69.80 |
| 100 | $5.91 | $591.00 |
| 500 | $5.21 | $2,605.00 |
| 1,000 | $4.61 | $4,610.00 |
| 2,500 | $4.05 | $10,125.00 |
LTC4162IUFD-FAD#TRPBF 개요
A PowerPath controller is a category of battery-management IC that decouples the system load from the battery, allowing a portable product to start up instantly even when the battery is deeply discharged or absent. Inside the broader hierarchy, the LTC4162-F sits as a switching battery charger + power-path manager IC under the umbrella of battery management PMICs, which themselves belong to power management. This topology is critical for USB-C PD, solar-powered, and uninterruptible portable designs where input source (wall adapter, backplane, PV panel) and battery must share a single output rail without back-feeding.
Key features include the integrated synchronous step-down converter that eliminates the external Schottky diode, an I²C/SMBus-compatible telemetry interface that reports VIN, VBAT, IBAT, thermistor temperature, and charge status to the system host, plus ±2% accurate charge current programming. The FAD variant targets LiFePO4 (3.2 V/cell nominal) and Li-ion chemistries through factory charge-profile programming.
Technically, the device uses constant-current/constant-voltage (CC/CV) control with built-in cell-count selection, automatic input-current limiting, JEITA-compatible NTC thermistor input, and reverse-current blocking from battery to input. The PowerPath MOSFET driver supports instant-on operation even with a dead battery.
Typical applications include handheld industrial instruments, e-mobility (e-bikes, light EVs), solar-powered IoT, medical carts, and portable military radios that use 4S–9S LiFePO4 packs. The wide VIN range tolerates fluctuating solar panels and noisy industrial buses.
When designing with this part, budget PCB copper area for the exposed thermal pad; at 3.2 A charge current and VIN = 24 V to VBAT = 14.4 V the IC can dissipate several watts. Place CIN, COUT, and the sense resistor as close to the IC as possible to minimize switching-loop parasitic inductance.
This page synthesizes distributor pricing, drop-in same-package alternatives within the LTC4162-F family, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: LTC4162IUFD-FAD#TRPBF — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LTC4162IUFD-FADM#PBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC4162IUFD-FSTM#PBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC4162IUFD-SAD#TRPBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC4162EUFD-FAD#TRPBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC4162IUFD-FAD#TRPBF 사양
| 토폴로지 | Synchronous step-down switching charger with PowerPath manager |
| Supported Battery Chemistry | LiFePO4 / Li-ion (FAD option) |
| Number of Cells Supported | 1S to 9S |
| 입력 전압 범위 | 4.5 V to 35 V |
| Maximum Charge Current | 3.2 A |
| Charger Type | CC/CV (constant-current / constant-voltage) |
| PowerPath Function | Yes - seamless input/battery load sharing |
| Telemetry Interface | I²C / SMBus |
| NTC Thermistor Input | Yes (JEITA-compatible) |
| Input Current Limit | Programmable |
| 패키지 | 28-pin QFN (4 mm × 5 mm × 0.75 mm) with exposed pad |
| 실장 유형 | Surface Mount (Tape & Reel) |
| 동작 온도 범위 | -40 °C to +125 °C (industrial, 'I' suffix) |
| RoHS 상태 | Compliant (TRPBF suffix indicates Pb-free) |
LTC4162IUFD-FAD#TRPBF 핀 구성
| 핀 1 | VIN — Input supply voltage (4.5 V-35 V) |
| 핀 2 | VIN — Input supply voltage (4.5 V-35 V) |
| 핀 3 | IN_SYS — Input to system load switch |
| 핀 4 | SYS — System load output |
| 핀 5 | BAT — Battery connection |
| 핀 6 | BAT — Battery connection |
| 핀 7 | SW1 — Switch node 1 (synchronous buck high-side) |
| 핀 8 | SW2 — Switch node 2 (synchronous buck low-side) |
| 핀 9 | PGND — Power ground |
| 핀 10 | PGND — Power ground |
| 핀 11 | PROG — Charge current programming (Iset resistor) |
| 핀 12 | CLPROG — Input current limit programming |
| 핀 13 | NTC — Battery thermistor input (JEITA) |
| 핀 14 | EN — Charger enable (active high) |
| 핀 15 | CHRG — Open-drain charge status indicator |
| 핀 16 | FAULT — Open-drain fault indicator |
| 핀 17 | SDA — I²C data |
| 핀 18 | SCL — I²C clock |
| 핀 19 | ADDR — I²C slave address select |
| 핀 20 | THM — Die temperature monitor output |
| 핀 21 | VC — Internal regulator bypass |
| 핀 22 | VCC — Internal 3.3 V LDO output |
| 핀 23 | REGN — Gate drive regulator |
| 핀 24 | BG — Bandgap reference bypass |
| 핀 25 | AIN — Analog telemetry input |
| 핀 26 | NC — Not connected (per datasheet) |
| 핀 27 | NC — Not connected (per datasheet) |
| 핀 28 | EPAD — Exposed thermal pad - must be soldered to PGND copper pour |
일반적인 애플리케이션
LTC4162IUFD-FAD#TRPBF 적합 용도: 6 애플리케이션s: Portable Industrial Instruments with LiFePO4 Backup, Solar-Powered Outdoor IoT / Remote Sensors, E-Mobility Light EVs and Pedelecs, Medical Carts and Mobile Diagnostic Equipment, Portable Military and Tactical Radio Chargers, USB-C PD Powered Tablet Computers.
Portable Industrial Instruments with LiFePO4 Backup
The LTC4162IUFD-FAD#TRPBF fits portable industrial instruments because its 35 V input tolerates wide-range 12-24 V industrial bus rails and the integrated PowerPath lets a handheld multimeter or calibration tool boot instantly from a wall adapter even with a deeply discharged LiFePO4 pack. The 3.2 A charge current refills a 4S-9S LiFePO4 stack quickly between shifts, while the I²C telemetry reports VBAT and IBAT to the host MCU for runtime estimation. FAD charge profile enforces precise 3.6 V/cell CV termination required by LiFePO4 chemistry. Recommended companions: STM32L4 MCU for telemetry polling and TPS7A4701 LDO for analog rail cleanliness.
추천
Solar-Powered Outdoor IoT / Remote Sensors
The LTC4162IUFD-FAD#TRPBF suits solar-powered IoT nodes because its 4.5 V-35 V VIN accepts raw PV panel output through a small buck pre-regulator or directly from a 36 V panel. The I²C-reported VIN telemetry lets an external MPPT algorithm on the host MCU throttle charge current based on available solar irradiance. Integrated PowerPath instant-on ensures the sensor wakes up even after a long cloudy period with a depleted LiFePO4 pack. The 3.2 A maximum charge current supports 30-60 W PV arrays charging 4S-8S LiFePO4 storage. Recommended companions: nRF52840 BLE MCU and a 24 V PV panel.
추천
E-Mobility Light EVs and Pedelecs
The LTC4162IUFD-FAD#TRPBF serves light electric vehicles such as e-bikes, e-scooters, and mobility scooters where a 7S-9S LiFePO4 pack (24-36 V) requires 2-3 A charging from a 36-42 V input. The integrated synchronous step-down eliminates an external Schottky diode, simplifying the BMS topology and reducing BOM cost. PowerPath instant-on prevents the rider from being stranded if the pack drops below safe SOC at a stoplight. I²C telemetry reports cell-level status to a handlebar display. Recommended companions: a 7S LiFePO4 pack with cell-level BMS and a CAN bus display.
추천
Medical Carts and Mobile Diagnostic Equipment
The LTC4162IUFD-FAD#TRPBF is ideal for medical carts and mobile diagnostic carts because its industrial -40 °C to +125 °C range supports hospital corridors, ambulance bays, and outdoor screening environments. The PowerPath function allows a connected ultrasound or vital-signs cart to run directly from wall power while simultaneously charging the LiFePO4 backup pack, eliminating downtime during patient transport. Telemetry supports FDA-mandated battery health logging. Recommended companions: a medical-grade isolation transformer and a LiFePO4 8S pack with a redundant BMS.
추천
Portable Military and Tactical Radio Chargers
The LTC4162IUFD-FAD#TRPBF works in portable military radio chargers because the wide VIN handles 28 V vehicle bus inputs, field solar panels, and AC adapters alike. The integrated synchronous converter shrinks the charger PCB to fit the small form-factor of a hand-held radio drop-in charging cradle. LiFePO4 chemistry provides the long cycle life and thermal tolerance required by MIL-STD-810. The I²C telemetry supports the radio's own battery state-of-charge reporting without extra analog circuitry. Recommended companions: a sealed LiFePO4 6S or 7S pack and a ruggedized DC input connector.
추천
USB-C PD Powered Tablet Computers
The LTC4162IUFD-FAD#TRPBF supports USB-C PD tablet computers where a 15-20 V PD contract from a Type-C adapter must charge a 2S-3S LiFePO4 backup pack while powering the system load directly. PowerPath instant-on eliminates the brown-out gap during adapter hot-plug events. The I²C interface integrates with the tablet's embedded controller (EC) for unified charge status reporting. Recommended companions: FUSB302 PD controller and an EC such as MEC1521.
추천
추천 제품 요약
엔지니어링 참조 데이터: LTC4162IUFD-FAD#TRPBF — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LTC4162IUFD-FADM#PBF | LTC4162IUFD-FSTM#PBF | LTC4162IUFD-SAD#TRPBF | LTC4162EUFD-FAD#TRPBF |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-QFN (4x5 mm) with EPAD | 28-QFN (4x5 mm) with EPAD - same | 28-QFN (4x5 mm) with EPAD - same | 28-QFN (4x5 mm) with EPAD - same | 28-QFN (4x5 mm) with EPAD - same |
| Maximum Charge Current | 3.2 A | 3.2 A | 3.2 A | 3.2 A | 3.2 A |
| Input Voltage Range | 4.5 V - 35 V | 4.5 V - 35 V | 4.5 V - 35 V | 4.5 V - 35 V | 4.5 V - 35 V |
| Charge Chemistry Profile | LiFePO4 / Li-ion (FAD) | LiFePO4 / Li-ion (FAD) | LiFePO4 / Li-ion (FSTM) | Sealed Lead Acid (SAD) | LiFePO4 / Li-ion (FAD) |
| Operating Temperature Range | -40 °C to +125 °C (I-grade) | -55 °C to +125 °C (M-grade) | -40 °C to +125 °C (I-grade) | -40 °C to +125 °C (I-grade) | 0 °C to +85 °C (E-grade) |
| PowerPath Function | Yes | Yes | Yes | Yes | Yes |
| Telemetry Interface | I²C / SMBus | I²C / SMBus | I²C / SMBus | I²C / SMBus | I²C / SMBus |
주요 차별점
- PowerPath instant-on from dead battery (vs LTC4124)
- Wide VIN range 4.5 V - 35 V for industrial buses (vs LTC4124 (max VIN 5.5 V))
- Multi-cell LiFePO4 support up to 9S (vs LTC4162IUFD-SAD#TRPBF)
설계 노트
Estimated: At VIN = 24 V, VBAT = 14.4 V (4S LiFePO4), and ICHG = 3.2 A, the LTC4162IUFD-FAD#TRPBF dissipates roughly (24 - 14.4) × 3.2 = 30.7 W minus synchronous-FET conduction losses. Always solder the exposed EPAD (pin 28) to a continuous PGND copper pour with at least 1 oz copper over 100 mm² of board area. Without adequate copper, the junction will exceed 125 °C at full load and trigger thermal foldback, throttling charge current. For sustained 3 A operation above 25 °C ambient, add a small heatsink or forced-air cooling.
Place CIN (low-ESR ceramic, ≥22 µF 50 V) directly across VIN and PGND with a short loop, and place COUT (≥22 µF 50 V) close to SYS/VBAT. The SW1/SW2 node carries high di/dt; keep the high-side FET, low-side FET, and input cap loop area under 0.5 cm² to avoid 100 MHz+ ringing. Use 4-layer PCB with a dedicated PGND and AGND split connected at a single point near the EPAD to keep switching noise out of the I²C/SDA lines.
Do not omit the NTC thermistor - LiFePO4 packs require JEITA-style temperature-dependent charge voltage scaling. The PROG resistor sets maximum charge current; if left floating, the charger defaults to a low default current and may not meet your charge-time budget. The I²C ADDR pin must be tied high, low, or left floating to select one of three slave addresses - sharing the bus with another LTC4162-F variant requires unique addresses. The TRPBF suffix confirms Pb-free / RoHS compliance; the older #PBF suffix is also Pb-free but in tube packaging.
규정 준수 정보
TRPBF suffix confirms Pb-free / RoHS compliant per ADI packaging marking. AEC-Q100 not qualified; for automotive, contact ADI about AEC-Q100 grades. REACH compliance per ADI product declaration.
