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TPS65131输出正负15V的带载能力

Other Parts Discussed in Thread: OPA2188, TPS65131

最近用TPS65131芯片设计做一个模拟电路供电电源,电源输入电压为5V,输出为正负15V,当系统空载时能正常输出正负15V电压,当带上10片OPA2188运放后,输出正电压只有4.7V,无负电压输出了,且伴随有哨叫声,这是带不动这么多负载吗?不解,请大神帮助。