Thông số kỹ thuật
MAX713CSE is Maxim Integrated (Analog Devices) NiCd/NiMH fast charge controller IC, narrow-body 16-SOIC commercial grade surface-mount device. It adopts negative delta-V (negative voltage slope) full-charge termination algorithm, supporting 1–16 series nickel battery cells, with triple charge cutoff mechanisms (voltage slope, temperature window, safety timer) for reliable fast charging conversion to maintenance trickle currentAnalog Devices.
👉 Difference vs MAX712CSE: MAX712 judges full charge via zero delta-V; MAX713 uses negative delta-V drop detection, better suited for NiMH batteries with gentler voltage peak curve and less overcharging risk.
Key Functional Features
- Multi-Cell Programmable Charging Range
- Support 1~16 series NiCd / NiMH cells, cell count configured via PGM0/PGM1/PGM2/PGM3 hardware pins
- Fast charge rate configurable C/4 ~ 4C; post-full charge auto switch to C/16 low trickle maintenance current
- VLIMIT pin sets single-cell max charging voltage to avoid overvoltage damage
- Triple Independent Full-Charge Termination Protection
- Core cutoff: Negative ΔV voltage slope detection (unique MAX713 core logic)
- Temperature window comparator: THI/TLO pins monitor NTC thermistor to stop charging on overheat
- Built-in programmable safety timer, forced terminate fast charge to prevent infinite charging failure
- Power Path & Low Leakage Design
- Low-side current sense architecture: Can power system loads while charging battery simultaneously
- Max 5μA leakage drawn from battery when charger input power is removed, minimizing self-discharge
- On-board 5V shunt regulator supplies peripheral logic circuits without extra LDO
- Compatible with linear or switch-mode external power drive circuits (only PNP power transistor + few passive components required)
- Complete Safety Protection Logic
- Battery absence detection, short-circuit current limit
- Over-temperature lockout with auto-recovery after cooling down
- Fixed temperature threshold comparator for thermal runaway prevention
- FASTSCHG status pin outputs logic level to indicate fast-charging running state
Electrical Specifications
- Input DC supply: ≥ battery pack max voltage + 1.5V
- Internal reference VREF = 2.0V precision bandgap
- Operating quiescent supply current <1mA
- All logic pins TTL/CMOS compatible
Package & Environmental Ratings
- Package: 16-pin narrow SOIC (3.9mm width, PDSO16 SMD)
- Temperature grade: Commercial 0°C ~ +70°C
- Suffix CSE = tube packaging; tape-and-reel variant MAX713CSE+T available
- Non-lead-free, early-generation industrial charger chip (not RoHS compliant)
- MSL 1 moisture sensitivity level, unlimited floor life without dry bag
Ứng dụng điển hình
Portable cordless telephone NiMH battery charging base stations
Handheld industrial test equipment nickel battery charger modules
Cordless power tool 4~10S NiCd/NiMH charging circuits
Vintage notebook, palmtop portable device battery management
Portable audio players, walkie-talkies nickel battery chargers
Medical handheld portable equipment nickel battery charging boards
Educational electronics Ni battery fast charge demo circuits
LXB Semicon supplies original Analog Devices MAX713CSE negative delta-V NiCd/NiMH fast charge controller IC
