HV310

更新时间： 2024-01-13 17:31:38

品牌	Logo	应用领域
超科 - SUPERTEX		控制器
页数	文件大小	规格书
6页	79K
描述
Hotswap, Inrush Current Limiter Controllers

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中文翻译

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技术参数
数据手册

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HV310 技术参数

是否Rohs认证：	符合	生命周期：	Lifetime Buy
包装说明：	4.90 X 3.90 MM, 1.75 MM HEIGHT, 1.27 MM PITCH, GREEN, MS-012AA, SOIC-8	Reach Compliance Code：	compliant
Factory Lead Time：	13 weeks	风险等级：	5.69
Base Number Matches：	1

HV310 数据手册

HV300/HV310

Typical Application Circuit

Long

GND

Jumper

Short

GND

PWRGD

487kΩ

ENABLE

+5V

HV300LG or

HV310LG

6.81kΩ

Cload

DC/DC

PWM

CONVERTER

COM

9.76kΩ

RAMP

SENSE

GATE

NOTES: 1. Undervoltage Lockout (UV) set to 35V

2. Overvoltage Lockout (OV) set to 65V

3. Remove Jumper if Short Pin is used

10nF

Long

-48V

50mΩ

IRF530

UV_off= 1.16 = 35 * (R2 + R3) / 500K

R2 = (1.16 * 500K) / 35 – 9.76kΩ = 6.81kΩ.

The closest 1% value is 6.81kΩ.

Application Information

Under Voltage and Over Voltage Detection

The UV and OV pins are connected to comparators with nominal

1.21V thresholds and 100mV of hysteresis (1.21V ± 50mV).

They are used to detect under voltage and over voltage

conditions at the input to the circuit. Whenever the OV pin rises

above its threshold or the UV pin falls below its threshold the

GATE voltage is immediately pulled low, the PWRGD signal is

deactivated and the external capacitor connected to the RAMP

pin is discharged.

Then R1 = 500K – (R2 +R3) = 483kΩ

The closest 1% value is 487kΩ.

The under voltage and over voltage trip points can be

programmed by means of the three resistor divider formed by

R1, R2 and R3. Since the input currents on the UV and OV pins

are negligible the resistor values may be calculated as follows:

Undervoltage/Overvoltage Operation

GND

OFF

V_IN

UV_off= V_UVH= 1.16 = |V_EEUV| * (R2+R3) / (R1+R2+R3)

OV_off= V_OVL= 1.26 = |V_EEOV| * R3 / (R1+R2+R3)

OFF

Where |V_EEUV| and |V_EEOV| are Under & Over Voltage Set

points.

Pass

Transistor

OFF

If we select a divider current of 100µA at a nominal operating

input voltage of 50 Volts then

(R1+R2+R3) = 50V / 100µA = 500kΩ

Current Limit

From the second equation for an Over voltage set point of 65

Volts the value of R3 may be calculated.

The current limit magnitude above which the current will not be

allowed to rise during startup is programmed using a sense

resistor connected from the SENSE pin to V_EEpin. For example

to program a current limit of 1A, one would choose a resistor as

follows:

OV_off= 1.26 = 65 * R3 / 500kΩ

R3 = (1.26 * 500K) / 65 = 9.69 kΩ

The closest 1% value is 9.76kΩ.

Rsense = 50mV / Isense

Rsense = 50mV / 1A

Rsense = 50mΩ

From the first equation for an Under Voltage set point of 35

Volts the value R2 can be calculated.

08/26/02rev.10b

1235 Bordeaux Drive, Sunnyvale, CA 94089

TEL: (408) 744-0100 • FAX: (408) 222-4895

www.supertex.com

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