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"发那科电源管理芯片1610p：高性能电压模式控制PWM开关稳压器"

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e HA16107P/FP and HA16108P/FP are power management chips designed by Fanuc. These chips are essential for obtaining stable DC voltages from commercial AC power sources. They are capable of directly driving power MOSFETs and have a built-in timer function for secondary overcurrent protection. The HA16107P/FP and HA16108P/FP are equipped with protection features to ensure the safety and reliability of the power supply system. These include intermittent operation and delayed latched shutdown in unusual conditions. This enables the chips to effectively protect against potential hazards, ensuring the stable and efficient operation of the power supply system. These chips are particularly suitable for high-performance voltage mode control and are widely used in a variety of industrial applications. They provide a reliable and efficient solution for managing power in systems that require stable DC voltages. The HA16107P/FP and HA16108P/FP play a crucial role in ensuring the proper functioning of power supply systems, making them an indispensable component in many industries. In summary, the HA16107P/FP and HA16108P/FP power management chips by Fanuc are designed to provide stable and reliable DC voltages from AC power sources. With their advanced features for overcurrent protection and efficient operation, these chips are essential for high-performance voltage mode control in industrial applications. Their robust design and functionality make them a crucial component for ensuring the safety and stability of power supply systems in various industries.

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HA16107P/FP, HA16108P/FP

1. Timing in Normal Operation

Timing in these ICs is based on a triangular voltage waveform. The rising edge (leading edge) defines

the deadband time t

. The falling edge (trailing edge) defines the ON-duty control band t

. PWM

output is on in the area within t

that is bounded above by the triangle wave V

and error output V

E/O

The following pin outputs are related to PWM control:

• C

(pin 7): triangle-wave voltage output

• E/O (pin 15): error output voltage

• R

(pin 8): ON-duty pulse output voltage

• OUT (pin 2): PWM pulse output (for driving the gate of a power MOS FET)

2. Triangle Oscillator, Waveform and Frequency

The triangle oscillator in these ICs generates a triangular waveform by charging and discharging timing

capacitor C

with a constant current, as shown in the equivalent circuit. The C

charge current is:

I(C

Tchg

) = I

REF

− 2V

The discharge current is:

I(C

Tdischg

) = 2I

− I

, where I

REF

− 2V

In these equations Vref (reference voltage) is typically 6.45 V, and V

(base-emitter voltage of

internal transistors) is about 0.7 V.

The deadband time is:

+ 0.8 µs

× R

× 2V

REF

− 2V

≈ 0.4 × C

× R

+ 0.8 µs

The ON-duty time is:

− R

= t

The 0.8 µs in these equations is a correction term for internal circuit delays.

The maximum ON-duty is

Du max =

The oscillating frequency is:

OSC

1 − Du max

+ 0.8 µs

0.8 × C

× R

− R

+ 0.8 µs

(Hz)

When R

= R

, the maximum ON-duty is 50%, and:

0.8 C

+ 0.8 µs

OSC

≈ (Hz)

This approximation is fairly close, but it should be checked in-circuit.

HA16107P/FP, HA16108P/FP

3. Programming of Maximum ON-Duty (Du Max)

The preceding equations should be used to program the deadband or maximum ON-duty. The

following table gives a summary.

Condition R

> R

= R

< R

Triangle

waveform

Du max Less than 50% 50% Greater than 50%*

Note: In a primary-control switching regulator, Du Max > 50% is dangerous because the transformer will

saturate.

Soft Start and Quick Shutdown

One purpose of the soft-start function is to protect the switching controller and power MOSFET from

surges at power-up. Another purpose is to let the secondary-side DC voltage rise smoothly.

When power goes off, the quick-shutdown function rapidly discharges the capacitor in the soft-start circuit

(and at the same time switches the PWM output off) to prepare for the next power-on.

The soft-start function in these ICs lets the PWM output develop smoothly from zero to the designated

pulse width at power-up. The soft-start voltage is the 3.8 V voltage value of an internal Zener diode, so the

PWM output is able to start widening gradually as soon as the soft-start function starts operating. The soft-

start function will start promptly even if C

is large.

The soft-start and quick-shutdown modes are selected automatically in the IC, under control of the UVL

signal.

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电源管理芯片

The ML5238 is analog front end IC for 16 series Lithium Ion secondary battery pack protection system. The ML5238 provides the function of cell voltage monitoring, charge/discharge current monitoring function, and it can detect over-charge/over-discharge of each battery cell charge/discharge over-current. The ML5238 has short current detecting function which can turn off the external charge/discharge MOS-FET without external MCU.

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