Datasheet > BD99010EFV-ME2

BD99010EFV-ME2

更新时间： 2024-01-25 23:31:07

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
31页	1375K
描述
DC-DC Regulated Power Supply Module,

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BD99010EFV-ME2 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	compliant
风险等级：	1.69	模拟集成电路 - 其他类型：	DC-DC REGULATED POWER SUPPLY MODULE
峰值回流温度（摄氏度）：	260	处于峰值回流温度下的最长时间：	10
Base Number Matches：	1

BD99010EFV-ME2 数据手册

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BD99010EFV-M, BD99011EFV-M

Operation

The BD99010EFV-M and BD99011EFV-M are a synchronous rectifying step-down switching regulator with fast transient

response by the current mode PWM control system. These operate as PWM (Pulse Width Modulation) mode for heavy

load, and it operates as SLLM (Simple Light Load Mode) operation for the light load to improve efficiency. When FPWM is

enabled, the SLLM is disabled and these devices operate only the current mode PWM control.

(1) Synchronous rectifier

The application does not require an external Schottky diode as commonly used in conventional DC/DC converter IC’s. The

low-side power transistor provides two advantages: it reduces the switching losses by careful on-chip timing to prevent

shoot-through and improves the leakage current (resulting in large quiescent current) at high operating temperatures.

(2) Current mode PWM control

Synthesizes an additional PWM control signal, representing the inductor current next to the conventional PWM control signal,

representing the output voltage of the converter. The current feedback loop is essential to achieve regulation loop stability

under all load conditions at so-called continuous condition Buck conversion.

(a) PWM (Pulse Width Modulation) control

The PWM circuit operates as follows: At the start of every switch cycle the oscillator sets the flip-flop that controls the

power transistors. This flip-flop is reset again when the slope signal (representing the inductor current) is exceeding the

COMP signal (representing the difference between output voltage and internal reference).

(b) SLLM (Simple Light Load Mode) control

For small output currents, this device automatically switches to SLLM. In SLLM, the device operates in PWM control by

comparing the output voltage with an internal reference voltage. When the output voltages drops below the reference

voltage the output makes several switching pulses in order to raise the output voltage above reference level again. Next,

switching pulses are skipped because the SW output is off. Depending on the output load, the controller now waits at very

low current consumption until the output voltage is lower than the reference voltage to resume switching. When the time in

between the switching pulse skip becomes short the device exits the SLLM mode and resumes normal continuous

switching again. The load level of the switching pulse skip is changed by the input voltage and inductor value.

Figure 4. Diagram of current mode PWM control

Figure 5. PWM switching timing chart

Figure 6. SLLM switching timing chart

www.rohm.com

TSZ02201-0W1W0AL00030-1-2

07.Jul.2014 Rev.003

5/28

TSZ22111・15・001

1 2 3 456 7 8...31

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与BD99010EFV-ME2相关器件

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