MAX1987_MAX1988笔记本电脑CPU供电控制芯片

VDD DLM LXM BSTM D1 D2 D3 D5 D4 D0 DHMB0 B1 B2 S0 S1 S2 VCC REF ILIM TON TIME 1 2 3 4 5 6 7 8 9 10 11 12 36 35 34 33 32 31 30 29 28 27 26 25 CC I FB OA IN - OA IN + PS I IM VP OK SY SO K NE G PO S CC V GN D CS N CM N CM P SU S V+ BS TS LX S DH S PG ND DL S CS P MAX1987 MAX1988 48 47 46 45 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 SHDN CL KE N DD0 DP SL P CSN CSP CMP CMN VCC REF GND CCV POS NEG FB OAIN+ OAIN- TIME 6 BITS BLANK SKIP ILIM 19R R REF (2.0V) SHDN REF Gm Gm DPSLP R-2R DAC B0 T O B2 S0 T O S2 D0 –D 5 SU S SY SP OK PS I DD 0 0.9 x REF 1.1 x REF SYSPOK CLKEN IMVPOK Q Q T CMP CMN SKIP FAULT 1.5mV S R Q R S Q MAIN MAIN ON-TIME ONE-SHOT TRIGQ ON-TIME ONE-SHOT TRIGQ BSTM TON V+ CCI DHM LXM VDD DLM PGND TRIGQ ONE-SHOT MINIMUM OFF-TIME FB Gm Gm CMP CSP CMN CSN BSTS DHS LXS DLS MAX1987、MAX1988的内部电路框图 MAX1987、MAX1988是笔记本电脑中常用的CPU供电控制芯片，例如东芝M18、BENQ JOYBOOK 5000U等笔记本 电脑均采用这种CPU供电控制芯片。 MAX1987、MAX1988针脚封装图 MAX1987、MAX1988 次驱动 主驱动 延时启动 内部多路复用器，模式 控制和回转率控制 MAX1987、MAX1988的各引脚功能介绍 引脚号 引脚名称 引脚功能 1 TIME 频率设置端 2 TON 开关管开启频率控制端，接地时为 1000kHz，接基准电压时为 550kHz，开路时为 300kHz， 接电源 VCC时为 200kHz。 3-5 B0,B1,B2 供电模式设置端 6-8 S0,S1,S2 暂停模式电压选择输入端 9 SHDN 使能控制端 10 REF 2V 基准电压输出端 11 ILIM 限流设置端 12 VCC 供电电压输入端 13 GND 接地端 14 CCV 15 POS 反馈正相补偿端 16 NEG 反馈反相补偿端 17 CCI 电流平衡补偿端 18 FB 反馈输入端 19 OAIN- 双模式运算放大器反相输入和禁用输入端 20 OAIN+ 运算放大器正相输入端 21 PSI 电源状态指示灯输入端 22 SYSPOK 系统电源好信号输入 23 IMVPOK 开漏电源好信号输出 24 CLKEN 时钟启用逻辑输出 25-30 D5-D0 CPU 供电电压模式识别端 31 DDO 驱动器禁用输出 32 BSTM 主自举端 33 LXM 主电感连接反馈输入端 34 DHM 主上开关管驱动信号输出端 35 DLM 主下端开关管驱动信号输出端 36 VDD 驱动电路电压输入端 37 PGND 功率电流接地端 38 DLS 次下端开关管驱动信号输出端 39 DHS 次上开关管驱动信号输出端 40 LXS 次电感连接反馈输入端 41 BSTS 次自举端 42 V+ 电池电压输入端 43 SUS 44 DPSLP 深睡眠控制输入端 45 CMP 主电感正相电流检测输入端 46 CMN 主电感反相电流检测输入端 47 CSN 次电感反相电流检测输入端 48 CSP 次电感正相电流检测输入端 挂起模式 电压内部电路滤波器 D5 D4 D3 D2 D1 D0 0 0 0 0 0 0 1.708 0 0 0 0 0 1 1.692 0 0 0 0 1 0 1.676 0 0 0 0 1 1 1.660 0 0 0 1 0 0 1.644 0 0 0 1 0 1 1.628 0 0 0 1 1 0 1.612 0 0 0 1 1 1 1.596 0 0 1 0 0 0 1.580 0 0 1 0 0 1 1.564 0 0 1 0 1 0 1.548 0 0 1 0 1 1 1.532 0 0 1 1 0 0 1.516 0 0 1 1 0 1 1.500 0 0 1 1 1 0 1.484 0 0 1 1 1 1 1.468 0 1 0 0 0 0 1.452 0 1 0 0 0 1 1.436 0 1 0 0 1 0 1.420 0 1 0 0 1 1 1.404 0 1 0 1 0 0 1.388 0 1 0 1 0 1 1.372 0 1 0 1 1 0 1.356 0 1 0 1 1 1 1.340 0 1 1 0 0 0 1.324 0 1 1 0 0 1 1.308 0 1 1 0 1 0 1.292 0 1 1 0 1 1 1.276 0 1 1 1 0 0 1.260 0 1 1 1 0 1 1.244 0 1 1 1 1 0 1.228 0 1 1 1 1 1 1.212 D5 D4 D3 D2 D1 D0 1 0 0 0 0 0 1.196 1 0 0 0 0 1 1.180 1 0 0 0 1 0 1.164 1 0 0 0 1 1 1.148 1 0 0 1 0 0 1.132 1 0 0 1 0 1 1.116 1 0 0 1 1 0 1.100 1 0 0 1 1 1 1.084 1 0 1 0 0 0 1.068 1 0 1 0 0 1 1.052 1 0 1 0 1 0 1.036 1 0 1 0 1 1 1.020 1 0 1 1 0 0 1.004 1 0 1 1 0 1 0.988 1 0 1 1 1 0 0.972 1 0 1 1 1 1 0.956 1 1 0 0 0 0 0.940 1 1 0 0 0 1 0.924 1 1 0 0 1 0 0.908 1 1 0 0 1 1 0.892 1 1 0 1 0 0 0.876 1 1 0 1 0 1 0.860 1 1 0 1 1 0 0.844 1 1 0 1 1 1 0.828 1 1 1 0 0 0 0.812 1 1 1 0 0 1 0.796 1 1 1 0 1 0 0.780 1 1 1 0 1 1 0.764 1 1 1 1 0 0 0.748 1 1 1 1 0 1 0.732 1 1 1 1 1 0 0.716 1 1 1 1 1 1 0.700 MAX1987、MAX1988的25-30引脚的电平与输出电压之间的关系（SUS为低电平） 输出电压(V)输出电压(V)输出电压(V) 输出电压(V)输出电压(V)输出电压(V) 低功耗关闭模式 SHDN SYSPOK SUS DPSLP DDO PSI 0 x x x 0 x GND 1 0 0 x 1 x B0 to B2 1 1 0 1 1 1 D0–D5 1 1 0 1 0 0 D0–D5 1 1 0 0 0 x D0–D5 1 x 1 x 0 x S0 to S2 1 0 x x 0 x GND 操作模式真值表 操作模式电压输出 状态 正常运行 脉冲跳变覆写 深睡眠模式 暂停模式 故障模式 上电模式(无补偿) (加补偿) (无补偿) (无补偿) (无补偿) S2 S1 S0 GND GND GND 1.452 GND GND REF 1.436 GND GND OPEN 1.420 GND GND VCC 1.404 GND REF GND 1388 GND REF REF 1.372 GND REF OPEN 1.356 GND REF VCC 1.340 GND OPEN GND 1.324 GND OPEN REF 1.308 GND OPEN OPEN 1.292 GND OPEN VCC 1.276 GND VCC GND 1.260 GND VCC REF 1.244 GND VCC OPEN 1.228 GND VCC VCC 1.212 REF GND GND 1.196 REF GND REF 1.180 REF GND OPEN 1.164 REF GND VCC 1.148 REF REF GND 1.132 REF REF REF 1.116 REF REF OPEN 1.100 REF REF VCC 1.084 REF OPEN GND 1.068 REF OPEN REF 1.052 REF OPEN OPEN 1.036 REF OPEN VCC 1.020 REF VCC GND 1.004 REF VCC REF 0.988 REF VCC OPEN 0.972 REF VCC VCC 0.956 S2 S1 S0 OPEN GND GND 0.940 OPEN GND REF 0.924 OPEN GND OPEN 0.908 OPEN GND VCC 0.892 OPEN REF GND 0.876 OPEN REF REF 0.860 OPEN REF OPEN 0.844 OPEN REF VCC 0.828 OPEN OPEN GND 0.812 OPEN OPEN REF 0.796 OPEN OPEN OPEN 0.780 OPEN OPEN VCC 0.764 OPEN VCC GND 0.748 OPEN VCC REF 0.732 OPEN VCC OPEN 0.716 OPEN VCC VCC 0.700 VCC GND GND 0.684 VCC GND REF 0.668 VCC GND OPEN 0.652 VCC GND VCC 0.636 VCC REF GND 0.620 VCC REF REF 0.604 VCC REF OPEN 0.588 VCC REF VCC 0.572 VCC OPEN GND 0.556 VCC OPEN REF 0.540 VCC OPEN OPEN 0.524 VCC OPEN VCC 0.508 VCC VCC GND 0.492 VCC VCC REF 0.476 VCC VCC OPEN 0.460 VCC VCC VCC 0.444 MAX1987、MAX1988的25-30引脚的电平与输出电压之间的关系（SUS为高电平） 输出电压(V)输出电压(V)输出电压(V) 输出电压(V)输出电压(V)输出电压(V) B2 B1 B0 GND GND GND 1.708 GND GND REF 1.692 GND GND OPEN 1.676 GND GND VCC 1.660 GND REF GND 1.644 GND REF REF 1.628 GND REF OPEN 1.612 GND REF VCC 1.596 GND OPEN GND 1.580 GND OPEN REF 1.564 GND OPEN OPEN 1.548 GND OPEN VCC 1.532 GND VCC GND 1.516 GND VCC REF 1.500 GND VCC OPEN 1.484 GND VCC VCC 1.468 REF GND GND 1.452 REF GND REF 1.436 REF GND OPEN 1.420 REF GND VCC 1.404 REF REF GND 1.388 REF REF REF 1.372 REF REF OPEN 1.356 REF REF VCC 1.340 REF OPEN GND 1.324 REF OPEN REF 1.308 REF OPEN OPEN 1.292 REF OPEN VCC 1.276 REF VCC GND 1.260 REF VCC REF 1.244 REF VCC OPEN 1.228 REF VCC VCC 1.212 B2 B1 B0 OPEN GND GND 1.196 OPEN GND REF 1.180 OPEN GND OPEN 1.164 OPEN GND VCC 1.148 OPEN REF GND 1.132 OPEN REF REF 1.116 OPEN REF OPEN 1.100 OPEN REF VCC 1.084 OPEN OPEN GND 1.068 OPEN OPEN REF 1.052 OPEN OPEN OPEN 1.036 OPEN OPEN VCC 1.020 OPEN VCC GND 1.004 OPEN VCC REF 0.988 OPEN VCC OPEN 0.972 OPEN VCC VCC 0.956 VCC GND GND 0.940 VCC GND REF 0.924 VCC GND OPEN 0.908 VCC GND VCC 0.892 VCC REF GND 0.876 VCC REF REF 0.860 VCC REF OPEN 0.844 VCC REF VCC 0.828 VCC OPEN GND 0.812 VCC OPEN REF 0.796 VCC OPEN OPEN 0.780 VCC OPEN VCC 0.764 VCC VCC GND 0.748 VCC VCC REF 0.732 VCC VCC OPEN 0.716 VCC VCC VCC 0.700 上电模式下的输出电压与B2、B1、B0之间的关系 输出电压(V)输出电压(V)输出电压(V) 输出电压(V)输出电压(V)输出电压(V) OFF ON BSTM DHM LXM DLM VDDVCC D0 D1 D3 D4 FB DAC INPUTS (1V LOGIC) REF CREF 0.22µF CCCV 270pF PGND V+ CCV NEG CCI S0 S1SUSPEND INPUTS(FOUR-LEVEL LOGIC) POS CSP ILIM TIME SUS PSI MODE CONTROL C3 100pF RTIME 28kΩ R8 100kΩ POWER GROUND ANALOG GROUND GND D5 S2 B0 B1BOOT INPUTS(FOUR-LEVEL LOGIC) B2 OAIN- OAIN+ CMN CMP IMVPOK SYSPOK R12 100kΩ R13 100kΩ R11 100kΩ C2 1µF TONFLOAT(300kHz) PO W ER -G OO D LO GI C SI GN AL S R2 750Ω R3 1.0kΩ CCCI 470pF R9 30.1kΩ INPUT* 8V TO 24V LM CIN NH(M) NL(M) RCM CBST(M) 0.1µF R10 10Ω 5V BIAS SUPPLY C1 2.2µF DDO SHDN DPSLP CLKEN MAX1987 MAX1988 LS CIN NH(S) NL(S) RCS CBST(S) 0.1µF BST DIODES R1 1.5kΩ R7 100kΩ R4 750Ω R5 1.0kΩ R6 2.74kΩ CSN BSTS DHS LXS DLS RCCI 1MΩ OUTPUT COUT COUT *LOWER INPUT VOLTAGES REQUIRE ADDTIONAL INPUT CAPACITANCE D2 R14 4.7kΩ C4 4.7nF MAX1987、MAX1988的典型应用电路图