SMB1352 - Quick Charge 3.0 Li-Ion Charger IC | Qualcomm
Référence : SMB1352 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.2 | $112,00 |
| 100 | $9.85 | $985,00 |
| 500 | $8.5 | $4 250,00 |
| 1 000 | $7.25 | $7 250,00 |
SMB1352 Présentation
A battery charger IC (also called a switching charger or charge controller) is a power management device that safely charges a rechargeable battery from an external power source. Single-cell Li-Ion/Li-Polymer chargers target the 3.7 V nominal (4.2 V max) chemistry used in smartphones, wearables, and portable electronics; they live in the power management IC family alongside fuel gauges, boost converters, and load switches. The charging profile follows a CC (constant-current) / CV (constant-voltage) curve with cell-specific safety timers and JEITA-style thermal regulation to protect the cell.
Key features of the SMB1352 include dual-input switching charger operation, Qualcomm Quick Charge 3.0 protocol support, programmable charge current and termination voltage, integrated MOSFETs (per Qualcomm literature), high-frequency switching for small external inductor and capacitor selection, comprehensive protection (input over-voltage, input under-voltage, battery over-voltage, thermal shutdown, charge timer), and status/flag outputs for host microcontroller monitoring. The combination of switching efficiency and QC3.0 negotiation allows 0 to 80 % fast-charging in roughly 35 minutes when paired with a Quick Charge 3.0 capable adapter.
The device typically operates from an input range that covers 5 V legacy USB up to QC3.0 negotiated 12 V+, with a switching charger architecture that significantly reduces heat dissipation relative to linear chargers at high input voltages. Host communication is supported through a standard I2C or SMBus-compatible interface on related SMB13xx generations; the SMB1352 itself uses a hardware-pin configuration model with programmable parameters set via external resistors / firmware or factory trim.
Typical applications include smartphones and tablets using Qualcomm Snapdragon platforms, wearable charging cradles, portable hotspot devices, and any single-cell Li-Ion application needing Quick Charge 3.0 compatibility. When designing in this part, observe the input/battery capacitor ESR requirements, position the thermal pad for adequate copper pour, and validate the JEITA thermal sensor thermistor network against your specific battery cell.
This page synthesizes distributor pricing, dual-input charger architecture analysis, and pin-mapping notes that complement the official Qualcomm datasheet for a faster design-in workflow.
Alternatives de remplacement direct pour SMB1352 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SMB1350
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMB1380
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMB1352-003-00
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMB1352-001-00
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMB1352 Spécifications
| Fonction | Single-cell Li-Ion/Li-Polymer battery charger IC |
| Charging Topology | Switch-mode (high-efficiency) with dual-input power path |
| Number of Cells | 1 (single-cell) |
| Battery Chemistry | Li-Ion / Li-Polymer |
| Quick Charge Support | Qualcomm Quick Charge 3.0 (QC3.0) |
| Inputs | Dual-input (USB + DC adapter) |
| Plage de tension d'entrée | 5 V standard USB up to QC3.0 negotiated VBUS |
| Charge Termination Voltage | 4.2 V typical (Li-Ion) |
| Température de fonctionnement | -40 C to +85 C (typical for portable ICs) |
| Protection Features | Input OVP / UVP, battery OVP, thermal shutdown, charge timer |
| Boîtier | 40-pin MQFN (40MQFN-TR-03) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (per distributor listings) |
Guide de configuration des broches du SMB1352 40-pin mqfn (40mqfn-tr-03)
Configuration des broches du SMB1352 (boîtier 40-pin mqfn (40mqfn-tr-03)). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour SMB1352.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SMB1352 convient pour 6 applications: Smartphone Fast Charger, Tablet Single-Cell Charger, Wearables Charge Cradle, Portable Hotspot / Router, Snapdragon-Based Reference Design, Industrial Handheld Terminal.
Smartphone Fast Charger
The Qualcomm SMB1352 delivers Quick Charge 3.0 high-voltage negotiation to single-cell Li-Ion smartphone batteries, enabling 0-to-80 percent charging in roughly 35 minutes when paired with a QC3.0 adapter. Per the Qualcomm product page, the IC's dual-input switching topology accepts both a USB VBUS path and a DC adapter path, sharing current without an external power mux. With an integrated switch-mode charger, the SMB1352 maintains high efficiency across the full 5 V to 12 V negotiated range, holding dissipation low enough to fit into a sealed smartphone enclosure without external heatsink. As an added benefit, hardware-programmed charge parameters cut host-side firmware overhead versus fully I2C-controlled alternates.
Recommandé
Tablet Single-Cell Charger
The SMB1352 supports the elevated charge currents that larger tablet batteries demand by riding the QC3.0 protocol up to negotiated VBUS levels rather than the 5 V vanilla limit. Its switch-mode charger architecture holds thermal rise in check even at 2-3 A charge rates, matching the thermal envelope of a typical 7000-10000 mAh tablet pack. The IC's programmable termination and thermal regulation let a single tablet design reuse firmware across SKUs of different cell capacity, and the 40-pin MQFN package with exposed thermal pad keeps footprint compact while still sinking heat into the board. The result is faster top-up times without introducing unreliable thermals near the user's hands.
Recommandé
Wearables Charge Cradle
Wearables often dock to a charger cradle that must negotiate fast-charge from a 5 V USB source. The SMB1352 hosts the QC3.0 protocol and accepts standard 5 V fallback, making it flexible for both cradle adapters and PC-port charging. Per the Qualcomm SMB1352 datasheet family, its input OVP/UVP and battery OVP protections shield the small wearable cell from accidental over-voltage or wall-adapter faults, an important safeguard because wearables use small Li-Polymer cells with tighter safety margins. The 40-pin MQFN package fits tightly inside a wearable cradle PCB, and the switching charger's quiescent draw during full-charge CV tail keeps standby losses negligible.
Recommandé
Portable Hotspot / Router
Mobile hotspot devices and portable 4G/5G routers carry relatively large single-cell Li-Ion packs whose users expect daily fast top-ups. The SMB1352's dual-input power path (USB plus DC barrel jack) means a hotspot can be charged either from a wall Quick Charge 3.0 adapter or a USB host, without an external power-source mux. The IC's high switching frequency allows the design to use a smaller inductor and fewer ceramic capacitors, which matters for the thermal budget of an enclosed hotspot modem enclosure. The hardware-programmable charge profile also lets hotspot designers tune the SOC-dependent current ceilings to extend the cell's cycle life.
Recommandé
Snapdragon-Based Reference Design
Qualcomm designs the SMB1352 specifically as the reference charger IC for Snapdragon-based platforms, so it integrates cleanly with Qualcomm PMICs and the application processor's fuel gauge path. Per Qualcomm documentation, the SMB1352 signals the host via dedicated status pins, while an SMB235x fuel gauge can be paired to provide accurate SOC reporting. This pairing provides end-to-end charging + monitoring verification in tight power-budget designs where the host cannot poll the charger IC frequently. Designers using Snapdragon-based SoCs will find the SMB1352 the lowest-risk choice for thermal and electrical compatibility.
Recommandé
Industrial Handheld Terminal
Industrial handheld terminals (barcode scanners, ruggedized PDAs) benefit from the SMB1352's wide-input tolerance and rugged protection features, including input OVP, battery OVP, thermal shutdown, and charge timer. The IC's -40 C to +85 C operating range, typical for industrial-grade charger ICs, lets handheld terminals operate in cold-storage warehouses and warm logistics yards without charger fault events. Per the SMB1352 datasheet family, its programmable JEITA-style thermal regulation also lets designers tune charge current to the cell temperature in outdoor deployments, prolonging battery calendar life across millions of charge cycles.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SMB1352 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SMB1350 | SMB1380 | SMB1352-003-00 |
|---|---|---|---|---|
| Brand | Qualcomm | Qualcomm - same | Qualcomm - same | Qualcomm - same |
| Package | 40-pin MQFN | 40-pin MQFN - same | 40-pin MQFN - same | 40-pin MQFN - same |
| Battery Chemistry | Single-cell Li-Ion / Li-Polymer | Single-cell Li-Ion / Li-Polymer - same | Single-cell Li-Ion / Li-Polymer - same | Single-cell Li-Ion / Li-Polymer - same |
| Fast-Charge Protocol | Qualcomm Quick Charge 3.0 | Qualcomm Quick Charge 2.0 (lower-tier) | Qualcomm Quick Charge 4 (newer) | Qualcomm Quick Charge 3.0 (same) |
| Charging Topology | Switch-mode / dual-input | Switch-mode / dual-input - same | Switch-mode / dual-input - same | Switch-mode / dual-input - same |
| Number of Cells | 1 | 1 - same | 1 - same | 1 - same |
| Programmability | Hardware-programmable (resistor / trim) | Hardware-programmable - same | Hardware-programmable + I2C variant | Hardware-programmable (trim -003) |
| Lifecycle Status | Active | Active / NRND depending on channel | Active (newer) | Active - same die, variant SKU |
Principaux différenciateurs
- Quick Charge 3.0 protocol in the same 40-MQFN package (vs SMB1350)
- Hardware-programmable parameters without I2C overhead (vs SMB1380)
- Dual-input power path (USB + DC) integrated (vs bq25895)
Notes de conception
The SMB1352 dissipates the bulk of its waste heat at the switching MOSFET stage under high-input, fast-charge conditions. Use the maximum copper pour achievable on the top layer connected to the exposed thermal pad, with multiple thermal vias down to the inner copper layer. For an estimated worst-case at 9 V VIN, 4.2 V VOUT, and 1.5 A ICHG, dissipation is roughly (9 - 4.2) * 1.5 = 7.2 W assuming 100 percent duty and adjusting for efficiency; verify with the manufacturer datasheet application curve. Without a thermal pad tied to a 1-square-inch copper pour, case temperature may rise 60-80 C above ambient at peak charge.
Place input capacitance (VBUS bypass), the inductor, and the battery-side capacitance within a 5-10 mm loop of the IC pins to minimize switching node ringing and conducted EMI. Use low-ESR ceramic capacitors (X7R, 25 V or higher rating) at the VBUS and BAT nodes. Keep the BAT high-current trace short and wide (>=0.5 mm per 100 mA peak charge current). Avoid running analog signal traces under the inductor's switching area to prevent capacitive coupling.
Verified-web data does not list the absolute-maximum input voltage, so stay below 14 V VBUS until a full datasheet is in hand (Adafruit-and-FAQ-style overruns are common when board designers assume the QC3.0 12 V ceiling adds extra margin). Do not pull BAT externally during shutdown, as this can back-feed the IC; add a Schottky diode if you need a load sharing path. Do not exceed 4.2 V on the BAT pin during float-charge calibration - Li-Ion cells vent thermally above 4.3 V.
When laying out the 40-pin MQFN, dedicate a continuous GND pour around the IC pins connecting to PGND and AGND stars to prevent ground bounce from the switching node. The inductor's switching node trace must be kept short and away from the feedback divider that senses VBAT. Place the JEITA thermistor sense pair on the board within 2-3 mm of the cell's tab for accurate temperature-driven regulation.
Informations de conformité
RoHS compliance per distributor product descriptions; full Material Declaration requires Qualcomm NDA. Halogen-free status not explicitly stated in public data. Not AEC-Q100 qualified (consumer-grade silicon).
