PT6304 4-Series Li-ion / Li-Polymer Battery Protection Chip - GSMicro Original Stock & Technical Solutions
PT6304 by CRMicrorobot is a high-performance protection chip designed specifically for 4-series lithium-ion / lithium-polymer battery packs. Supported with technical expertise by GSMicro (GSMicro Semiconductor), this chip integrates high-precision voltage detection circuitry and comprehensive protection features, effectively preventing battery damage or lifespan degradation caused by overcharge, over-discharge, over-current, short-circuit, and abnormal temperature conditions. Its compact TSSOP-16 package and minimal external component requirements make it an ideal choice for high-density battery packs in power tools, energy storage power supplies, and more.
Core Advantages
High-Precision Protection: Overcharge detection voltage accuracy of ±25mV ensures safe full-capacity charging; current detection accuracy of ±10mV guarantees accurate discharge over-current triggering.
Flexible Thermal Management: Discharge over-temperature / under-temperature (DOT/DUT) and charge over-temperature / under-temperature (COT/CUT) thresholds are independently configurable via external resistors, adapting to complex operating conditions.
Full MOS Driver Compatibility: Built-in circuitry directly drives external P-channel or N-channel charging MOSFETs and N-channel discharge MOSFETs, enabling flexible circuit design.
Multi-Level Over-Current Protection: Integrates three-stage discharge over-current detection (OC1, OC2, short-circuit) and independent charge over-current detection.
Ultra-Low Power Consumption: Operating current < 20μA, under-voltage current < 5μA, extending battery storage life.
Key Electrical Parameters
| Parameter | Value / Description |
| Battery Configuration | 4S (4-series) Li-ion / Li-Polymer |
| Overcharge Detection Voltage (VCOV) | 4.350V / 4.225V / 3.85V / 3.65V (optional) |
| Over-Discharge Detection Voltage (VCUV) | 2.8V / 2.7V / 2.5V / 2.3V (optional) |
| Discharge Over-Current Detection | VOC1: 50-200mV (4 levels); VSC (Short Circuit): 4×VOC1 |
| Supply Current | Operating < 20μA; Under-voltage < 5μA |
| Package | TSSOP-16 |
Pin Definition & Package Dimensions
Pin Definition (TSSOP-16):
VCC (1): Chip power supply pin.
VC4-VC1 (3-6): Positive and negative input terminals for the 4th to 1st battery cells respectively.
CS (8): Current sense voltage input.
VTD (9) / VTC (10): Used to set discharge and charge over-temperature / under-temperature protection thresholds respectively.
OC1S / OC2S (11-12): Discharge over-current OC1 and OC2 delay setting pins (external capacitor).
NDDR (13): N-channel discharge MOSFET driver pin.
NCDR (15) / PCDR (16): N-channel and P-channel charge MOSFET driver pins.
Package Outline (TSSOP-16):
Note: Refer to datasheet for actual dimensions, E1=4.40mm (typical)
Internal Block Diagram & Typical Application Circuit
Internal Functional Block Diagram:
Includes voltage detection, temperature detection, over-current protection logic, and MOS driver modules
Typical Application Circuit:
Connection: VC1-VC4 to battery pack, CS to current sense resistor, drive external MOSFETs
Ordering Information & Alternative Model Comparison
Ordering Example (PT6304ETSP-XX):
PT6304ETSP-AA: VCOV=4.225V, VCUV=2.70V, VOC1=50mV
PT6304ETSP-AB: VCOV=4.250V, VCUV=2.70V, VOC1=100mV (supports MOS sensing)
PT6304 can serve as an upgrade or alternative to the following products:
| Item | Competitor Chips | PT6304 Advantage |
| Drive Capability | Some competitors support N-MOS only | Supports both P-channel and N-channel charging MOSFETs for greater design flexibility |
| Temperature Protection | Fixed thresholds or single configuration | Independent external resistor configuration for charge/discharge OT/UT thresholds with higher accuracy |
| Package | SOP-16 or larger packages | TSSOP-16 (4.4x6.4mm), saving PCB area |
Typical Applications
Power Tools: Electric drills, saws, and other equipment requiring high-rate discharge protection.
Energy Storage: Portable energy storage battery packs, backup power systems.
Light Electric Vehicles: Electric scooters, balance scooter battery packs.
Industrial Equipment: Industrial handheld terminals requiring long life and high safety standards.
About GSMicro Semiconductor
GSMicro (Shenzhen) Co., Ltd. was founded in 2023, with predecessor Lumenchip established in 2010. Headquartered in Shenzhen, it is a leading brand focusing on the implementation of mixed-signal chip technologies and promoting the development of green intelligent technologies.
GSMicro integrates global advanced models and channels, breaking traditional distribution and agency models to create a one-stop service system including agency distribution, market analysis, technical solution support, and full-component supply. It runs both agency lines and own brands, providing innovative products and services centered on customer needs.
GSMicro owns complete solutions and product lines including MCUs, power management ICs, AI chips, signal chain chips, and power devices. Partners include DONGWOON Tech, CRMicrorobot, Huajing Micro, Yongyuan Micro, Gongcheng Semiconductor, Anhai Semiconductor, Risen Semiconductor, and many other well-known brands.
Adhering to the values of "Striver-oriented, Customer-centric, Value-driven", GSMicro focuses on chip technology implementation and leads global semiconductor segments in distribution and application solutions.
Contact Us Now: For the complete PT6304 datasheet, sample requests, or technical support, please visit our official website.
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