英飞凌ICE5BR3995BZ 800V/950V CoolMOS DIP-7芯片规格手册

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英飞凌（INFINEON）的ICE5BR3995BZ是一款高电压、低功耗的固定频率800V/950V CoolSET™集成芯片，采用DIP-7封装，专为各种工业级应用设计，如家用电器、电视、个人计算机（PC）、服务器、智能电表以及消费电子设备如蓝光播放器和机顶盒等提供辅助电源解决方案。该芯片的主要特点包括： 1. **集成800V/950V CoolMOS™**：这是一款高压功率开关元件，提供了强大的开关能力，适用于高压电源转换，确保了电路的稳定性和可靠性。 2. **增强型主动爆发模式**：允许用户选择不同的待机功率模式，提高了能源效率，特别是在需要降低功耗的场景中。 3. **数字频率调整**：通过数字化技术，可以优化系统的整体效率，减少不必要的损耗。 4. **快速启动**：采用cascode配置，能快速响应启动请求，缩短了电源转换的时间。 5. **DCM和CCM操作模式**：支持动态电流模式（DCM）和连续导通模式（CCM），并具有斜坡补偿功能，以实现更精确的电流控制和减少电磁干扰（EMI）。 6. **内置数字软启动**：减少了对输入电源的冲击，延长了元器件寿命，提高了系统稳定性。 7. **集成错误放大器**：支持直接反馈，特别适合非隔离式变换器，如flyback和buck拓扑，简化了设计过程。 8. **全面保护**：包括输入过电压、VCC过压、欠压、过载、开路和过热保护，所有保护机制均具备自动重启功能，增强了电路的安全性。 9. **有限的短路保护**：对VCC与GND之间的短路电流有严格的限制，防止过度电流对电路造成损害。 10. **环保合规**：芯片符合RoHS标准，使用无铅焊料和不含卤素的模塑化合物，符合绿色制造的要求。这款ICE5BR3995BZ芯片凭借其高性能和多方面的保护特性，是设计师在需要处理高电压和高效能应用时的理想选择。通过了解其详细规格和功能，工程师可以根据具体项目需求来优化电路设计，提高产品性能和耐用性。

Datasheet 7 of 40 Rev 1.1

2022-07-19

Pin configuration

Fixed-frequency 800 V / 950 V CoolSET™

in DIP-7 package

2 Pin configuration

The pin configuration is shown in Figure 5 and the functions are described in Table 3.

Figure 5 Pin configuration

Table 3 Pin definitions and functions

Symbol

Function

VERR

(BZ version)

Error amplifier

VERR pin is internally connected to the transconductance error amplifier for a non-

isolated converter. Connect this pin to GND for an isolated converter.

VIN

(CZ version)

Input line overvoltage protection (LOVP)

VIN pin is connected to the bus via a resistor divider (see Figure 1) to sense the line

voltage. Internally, it is connected to the line overvoltage comparator which stops the

switching when a LOVP condition occurs. To disable LOVP, connect this pin to GND.

Feedback and ABM entry and exit control

FB pin combines the functions of feedback control, selectable burst entry/exit control

and overload/open loop protection.

Current sense

The CS pin is connected to the shunt resistor for the primary current sensing externally

and to the PWM signal generator block for switch-off determination (together with the

feedback voltage) internally.

GATE

Gate driver output

The GATE pin is connected to the Gate of the internal CoolMOS™ and additionally, a pull-

up resistor is connected from a bus voltage to turn on the internal CoolMOS™ for charging

up the V

capacitor during startup.

DRAIN

DRAIN (Drain of integrated CoolMOS™)

The DRAIN pin is connected to the drain of the integrated CoolMOS™.

VCC

VCC (Positive voltage supply)

The VCC pin is the positive voltage supply to the IC. The operating range is between

VCC_OFF

and V

VCC_OVP

GND

Ground

The GND pin is the common ground of the controller.

Datasheet 8 of 40 Rev 1.1

2022-07-19

Functional description

Fixed-frequency 800 V / 950 V CoolSET™

in DIP-7 package

3 Functional description

3.1 V

precharging and typical V

voltage during startup

As shown in Figure 1, once the line input voltage is applied, a rectified voltage appears across the capacitor

BUS.

The pull-up resistor R

STARTUP

provides a current to charge the C

iss

(input capacitance) of CoolMOS™ and

gradually generate one voltage level. If the voltage over C

iss

is high enough, CoolMOS™ and the V

capacitor are

charged through the primary inductance of a transformer L

CoolMOS™ and the internal diode D

with the two

steps constant current source I

VCC_ Charge1

and I

VCC_ Charge3

A very small constant current source (I

VCC_Charge1

) is charged to the V

capacitor until V

reaches V

CC_SCP

to protect

the controller from the V

pin short to ground during the startup. After this, the second step constant current

source (I

VCC_Charge3

) is provided to charge the V

capacitor further, until the V

voltage exceeds the turned-on

threshold V

VCC_ON

. As shown in the time phase I in Figure 6, the V

voltage increases almost linearly with two

steps.

VCC_ON

VCC

VCC_OFF

II III

VCC_SCP

VCC_Charge2/3

VCC

VCC_Normal2

VCC_Charge1

-I

VCC

Figure 6 V

voltage and current at startup

The time for the V

precharging can then be calculated as:

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

 



 









 









󰇛



 



󰇜  







(1)

When the V

voltage exceeds the V

turn on threshold V

VCC_ON

at time t

, the IC starts to operate with soft start.

Due to the power consumption of the IC and the fact that there is still no energy from the auxiliary winding to

charge the V

capacitor before the output voltage is built up, the V

voltage drops (phase II). Once the output

voltage rises close to regulation, the auxiliary winding starts to charge the V

capacitor from the time t

onward

and delivering the I

VCC_ Normal2

to the CoolSET™. V

then reaches a constant value depending on the output load.

VCC_ Charge1/2/3

is charging current from the controller to VCC capacitor during startup.

VCC_ Normal2

is supply current from VCC capacitor or auxiliary winding to the CoolSET™ during normal operation.

剩余39页未读，继续阅读

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