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参数资料
| 型号： | BA6219BFP-YE2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER MOTOR REVERSE HSOP25 |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | 1.7A |
| 电源电压： | 8 V ~ 18 V |
| 工作温度： | -20°C ~ 75°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 25-SOP（0.213"，5.40mm）+ 2 翼片 |
| 供应商设备封装： | 25-HSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 1370 (CN2011-ZH PDF) |
| 其它名称： | BA6219BFP-YE2DKR |
BA6219BFP-Y,BA6222
Technical Note
2)
Output high voltage setting
This function optionally sets output voltage by the output high voltage setting pin and controls the motor rotating speed.
However, when the output high voltage is set to a low level, consumption at IC increases. Carry out thermal design with
sufficient margin incorporated with the power dissipation (Pd) under the actual application condition taken into account.
a)
BA6219BFP-Y
The circuit diagram associated with the output high voltage setting
VCC1
VR pin is as per shown on the right. The maximum output voltage
V OMAX is expressed by:
Q1
Q2
VCC2
Q3
V OMAX = VCC1 - ( V SAT(Q1) + V F(Q2) + V F(Q3) + V F(Q4) )
Q5
Q6
Q4
In addition, the relation of VR voltage to output voltage at V OMAX or lower is
expressed by:
V OH = VR + ( V F(Q5) + V F(Q6) + V F(Q7) ) - ( V F(Q2) + V F(Q3) + V F(Q4) )
V OH = VR + Δ V F ≈ VR
Q7
VR
Fig. 17
OUT
Δ V F depends on the output current but is nearly V OH =VR. (Reference values; V SAT ≈ 0.25V, V F ≈ 0.75V)
b)
BA6222
As the relationship between the output high voltage setting pin VR
voltage and output high voltage V OH is expressed by:
V OH ≈ 4 x VR + V OFS
In such event, V OFS means the offset voltage, which varies in accord with
output current and chip temperature.
The VR voltage region can be classified into three categories in accord
with the output state:
VOH
VCC1 - 3V F - V SAT
BA6222
BA6219BFP-Y
VR
(A) Output high voltage 0V offset region
(B) Fourfold gain region
(C) Output voltage saturated region
(A)
(B)
Fig. 18
(C)
Using this function with the VR pin connected to a load which has output impedance of several hundred ohms may
result in oscillation. In such event, connect a capacitor of 3300pF or higher to about 0.1 μ F across VR and GND
and make sure that the motor is free of oscillation.
c)
Power supply voltage range of VR voltage
When output voltage control pin (VR) is used:
VR < VCC1 - ( V SAT(Q1) + V F(Q5) + V F(Q6) + V F(Q7) )
VR ≈ VCC1 - 2.5V
VR < VCC2 - ( V SAT(Q3) - V F(Q3) - V F(Q2) ) - ( V F(Q5) + V F(Q6) + V F(Q7) )
VR ≈ VCC2 - 1V
The output voltage control function does not operate in the region
VOH
outside this range. In addition, when the VR pin is not used, use
Control range
Saturation range
VR
by shorting VR to VCC1.
Fig. 19
3)
Switching of rotating direction (FWD/REV)
When the rotating direction is changed over by the motor rotating condition, switch the direction after the motor is
temporarily brought to the BRAKE condition or OPEN condition. It is recommended to keep the relevant conditions as
follows:
via BRAKE: Longer than braking time*.
(* the time required for the output L terminal to achieve potential below GND when brake is activated.)
via OPEN: The time longer than 1 ms is recommended.
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
6/10
2011.05 - Rev.B
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相关代理商/技术参数 |
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