Switch-mode charger controller simplifies constant current control

5 June 2002 Power Electronics / Power Management

The ADP3806 is a standalone Li-Ion battery-charging IC that combines high output voltage accuracy with precise current control to improve the performance and reduce the design complexity of constant-current, constant-voltage (CCCV) chargers. According to the manufacturer, Analog Devices, the industry's highest end-of-voltage accuracy levels are achieved to within ±0,4% at 25°C, ±0,6% at 5°C to 55°C and ±0,7% at 0°C to 85°C. Application flexibility is built in with three selectable voltage options, programmable charge currents and programmable oscillator frequencies. Functional integration includes automatic current sensing with reverse input protection, undervoltage lockout and a bootstrapped synchronous drive for external NMOS FETs. (Synchronous operation provides high efficiency when charging at high current.) The ADP3806 is designed primarily for notebook PCs as well as fast chargers and handheld devices such as PDAs.

Three models of the ADP3806 offer adjustable battery voltages guaranteed to within ±0,6% of their specified value: the ADP3806-12.6 can be set to either 12,6 or 16,8 V, the ADP3806-12.5 can be either 12,525 or 16,7 V, and the adjustable version is useful for charging one- or two-cell Li-Ion batteries, or for custom Li-Ion cells. As a battery approaches its final voltage, the ADP3806 switches from constant-current mode to constant-voltage mode. The on-board current sense amplifier accepts rail-to-rail inputs to ensure precise and controlled operation under low drop out and short circuit conditions.

All models of the ADP3806 are housed in a 24-lead TSSOP package.

Analog Data Products SA

011 531 1400

Further reading:

3-terminal filters for automotive applications
RS South Africa Power Electronics / Power Management
TDK has expanded its YFF series of 3-terminal filters for automotive applications to include higher voltages up to 35 V and higher capacitances up to 4,7 µF.

Read more...

---

Simple battery charger ICs for any chemistry
Altron Arrow Editor's Choice Power Electronics / Power Management
The LTC4162 is a highly integrated, high voltage multi-chemistry synchronous monolithic step-down battery charger and PowerPath manager with onboard telemetry functions and optional maximum power point tracking.

Read more...

---

Why your PoE budget could make or break your next installation
Power Electronics / Power Management
In South Africa’s often unpredictable networking environments, understanding and planning your PoE budget is essential for system reliability, customer satisfaction, and long-term scalability.

Read more...

---

Five-minute EV charging a reality
Power Electronics / Power Management
Successfully demonstrated in Beijing recently at the Shanghai auto show, BYD claimed to add 400 km of range in just five minutes of charging.

Read more...

---

The evolution of power management in electronics
TRX Electronics Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.

Read more...

---

Power and precision in a compact package
Conical Technologies Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.

Read more...

---

Robust PoE module
CST Electronics Power Electronics / Power Management
The Ag59800-LPB high power, IEEE 802.3bt compliant, PD module from Silvertel offers typical efficiency of 95% making it an ideal choice for higher power, space-constrained applications.

Read more...

---

Cutting-edge solutions for Africa’s clean energy future
Power Electronics / Power Management
As Africa pushes towards reliable, affordable, and sustainable energy, Sungrow is driving transformation with cutting-edge innovations that enhance grid stability, reduce energy costs, and expand access to clean power.

Read more...

---

Transformer protection is a critical safeguard for municipal power stability
Power Electronics / Power Management
Transformer protection is not just a technical requirement; it is a vital component in ensuring the resilience and operational integrity of South Africa’s municipal power infrastructure.

Read more...

---

Reliable power solution
Conical Technologies Power Electronics / Power Management
The Mibbo MLD-120W-xxVx is a robust DIN-rail mounted DC-DC converter with a 120 W output capacity specifically designed for industrial and automation applications.

Read more...

---