Hotchip EC0059J
Hotchip EC0059J

Integrated Microphone Sensor Chip for Atomizers DFN8 (2*3) EC0059J

The EC0059J is a high-performance, highly integrated control chip designed for atomizers. Unlike traditional MCU solutions, this chip utilizes ASIC design, preventing issues such as system crashes and ensuring stable operation even when the voltage falls below the critical threshold, avoiding reset failures.

Categories: , ,

The EC0059J chip integrates microphone sensing detection, directly supporting microphone input with anti-interference processing to avoid false triggers. It includes a built-in MOSFET discharge switch, allowing atomizer heating elements to handle currents exceeding 5.3A and supporting heating wires with resistances as low as 0.8Ω. The chip ensures stable operation and features short-circuit protection, cutting off the output when the load resistance is less than 0.4Ω (Typ.).

In power-saving mode, the quiescent current is only 2.2uA (Typ.). The chip also incorporates independent lithium battery charging management, supporting multiple charging devices (AC-DC, USB) and features a comprehensive charging process (trickle, constant current, constant voltage), ensuring superior charging performance.

The EC0059J also provides a variety of protective functions, including long-duration smoking protection, output short-circuit protection, over-temperature protection, and under-voltage protection. Additionally, it has a visual LED indicator system that distinguishes different operational states with specific LED signals.

1. Specifications

Symbol Parameter Condition Min. Typ. Max. Unit
VDD Operating Voltage 3.05 – 4.3 V
Vuvlo Low Voltage Detection Threshold VDD From High to Low 2.95 3.05 3.15 V
Iq Static Current Power Saving Mode – 2.2 5 uA
Rdson Switch MOSFET on-resistance IAT=1A – 70 – mΩ
Iled LED Output Current – 5 – mA
RS Short-circuit Protection Threshold – 0.4 – Ω
VAT Constant Average Voltage Output VDD=4.2V, No-load Output – 3.60 – V
Rload Load Output 0.8 – – Ω
Dmin Minimum on-time Duty Cycle VDD=4.2V – 88 – %
TSMOKE Smoking Timeout – 10 – S
VCC Charging Input Voltage 4.5 5 5.5 V
VFLOAD Float Charge Threshold Voltage 4.10 4.15 4.20 V
VTRKL Trickle to Constant Current Transition VDD from low to high – 2.8 – V
ICH Charging Current VCC=5V – 550 – mA
ITRIKL Trickle Charging Current VCC=5V – 70 – mA
TSD Over-temperature Protection Threshold 140 155 170 ℃

2. Product Features

  • The peripheral circuit is simple and does not require an external MOSFET.
  • In power-saving mode, the static current is only 2µA (Typ.).
  • Supports heating element resistance as low as 8Ω.
  • 10-second long smoking protection.
  • 60V (Typ.) average output voltage.
  • Independent standard three-stage (trickle charge – constant current – constant voltage) lithium battery charging management.
  • Pre-set 15V (Typ.) charge cut-off voltage.
  • Maximum charging current is 550mA (Typ.), using intelligent temperature control technology; the charging current decreases as the temperature rises, ensuring maximum charging current without triggering overheat protection.
  • Built-in short-circuit protection (SCP).
  • Built-in undervoltage lockout protection (UVLO).
  • Built-in over-temperature protection (OTP).
  • Multiple LED indicators: simulating the actual smoking process, showing chip startup, voltage detection, various protection mechanisms, and the charging process.
  • Package type: DFN8 (2×3).

3. Typical Application Circuit Diagram

EC0059J Typical Application Circuit Diagram

4. Pin Diagram and Functional Description

Pin diagram Pin Name Pin Number Functional Description

EC0059J Pin Diagram and Functional Description
DFN8(2*3)
 SE 1 Smoking detection, connected to microphone sensor
VDD 2 Battery positive input
VDD 3 Battery positive input
VCC 4 Charging input
AT 5 Discharge output, connected to load
AT 6 Discharge output, connected to load
LED 7 LED indicator, connected to LED positive terminal
TS 8 Internal test pin, connected to GND or left floating
GND 9 Ground

5. Features

(1) Ultra-low quiescent current (<5µA)

(2) Multi-mode safe charging

(3) LED work indicators

(4) Protection control module

  • Ultra-low quiescent current in power-saving mode: The chip enters power-saving mode immediately after being powered on. When not in use, the circuit remains in power-saving mode, with a typical quiescent current as low as 2µA. The chip only switches from power-saving mode to normal operation during use, effectively extending battery life after each charge.
  • Multi-mode safe charging: After the chip completes its power-on self-test, it immediately enters power-saving mode. When not in use, the circuit stays in this mode, with a quiescent current of only 2µA (Typ.). The chip transitions to normal operation only during use, ensuring extremely low quiescent current loss in power-saving mode and prolonging battery life after each charge.
  • Visual LED work indicators: The LED indicators provide clear information on the system’s operational status, distinguishing between chip startup, usage duration, voltage detection, short-circuit protection, and the charging process.
  • Protection control module: The chip integrates multiple protection circuits, including undervoltage lockout (UVLO), over-temperature protection (OTP), overcurrent protection, short-circuit protection, and smoking timeout protection. The charging control module also includes an intelligent temperature control circuit that reduces the charging current when the chip junction temperature exceeds the preset threshold of approximately 120°C. This feature prevents the EC0059J from overheating and allows users to increase the board’s power handling capacity without risking damage to the chip.

Related products

Scroll to Top