LTC4015在配置成4.2V锂电池充电情况下，ICHARGRE_TARGET寄存器是只读状态，没有办法写入，且数据手册也明确指出不可编辑，如何才能降低充电电流以减轻MOSFET的发热？
手册如下：
CHARGER SETTING REGISTER DESCRIPTIONS (Sub-Addresses 0x1A through Ox2E)
Registers which control the primary charging parameters, such as charge voltage and charge current are only writable when the CHEMn pins are configured for a programmable chemistry algorithm (Li-lon-Prog, LiFePO4-Prog, oiLead-Acid-Prog). lf the CHElMn pins are configured for a fixed chemistry algorithm (Li-lon-Fixed-4.2, Li-lon-Fixed-4.1Li-lon-fixed-4.0, LiFeP0 -fixed-3.6, LiFeP0 -fixed-3.8/3.6, or Lead-Acid-Fixed) the LTC4015 ignores writes to theseregisters. See the section Chemistry Selection for more information about configuring the CHEMn pins.
