사양
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
일반적인 애플리케이션
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Educational electronics Ni battery fast charge demo circuits
LXB Semicon supplies original Analog Devices MAX713CSE negative delta-V NiCd/NiMH fast charge controller IC
