AnandhChallenge / Design Review Challenge

Project Information

Description
Think you're good at HW? There are 3 errors in this design. Fix them and get up to a $35 Amazon g/c! See the README below for instructions.
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Schematic and PCB Layout

Readme

FUNCTIONAL SPEC * The functional purpose of this design is to charge a battery from the USB connector that is connected to a 1.5A wall charger. This board also provides power to a load connected to VCC_SYS. Status is indicated by the LEDs. The battery is a standard LiPo with max voltage = 4.2V. A limit of 1.3A (+/- 20%) is imposed on the current drawn from the USB connector. A fast charge current of 800mA (+/- 10%) is imposed on the battery. CHALLENGE DETAILS * There are 3 errors in this schematic that will result in the board not working as specified above. * Fork the design, open it in the editor, find the errors, and fix them on the schematic. * Prizes: $25 Amazon Gift if you correctly fix all 3 schematic errors. Upped to $30 if you also make corresponding fixes to the layout and clear all Design Rule violations. Upped to $35 if you also find and fix the 4th bonus error on the layout (ie. the board will not fully function as specified if manufactured and assembled with the current layout. Hint: this error is obscure and you have to be a sharp HW design reviewer to spot it!) HOW TO SUBMIT Tweet us your Upverter username using this message: Hey @upverter, I'm <username> and I completed your Schematic Review challenge. Now gimme my $25 Amazon gift card! https://upverter.com/anandh/e853f6e7605457a0/Design-Review-Challenge/ * Submissions will be accepted until Feb 19, 2015!

Bill of Materials

Reference
Description
Manufacturer
Part Number
Package
Verified
Actual Part
Qty
Unit Cost
Order Qty
Total Cost
R10 Generic Resistor (1130) Generic Resistor (1130) 0402 (1005 metric) No Digi-key Number 1 ?? 0 0
R9 Generic Resistor (72000) Generic Resistor (72000) 0402 (1005 metric) No Digi-key Number 1 ?? 0 0
J1 USB Micro B, SMT HRS ZX62-B-5PA(11) No Digi-key Number 1 ?? 0 0
C1 Generic Capacitor (1e-06F) Generic Capacitor (1e-06F) 0402 (1005 metric) No Digi-key Number 1 ?? 0 0
R6 Generic Resistor (10000) Generic Resistor (10000) 0402 (1005 metric) No Digi-key Number 1 ?? 0 0
C5, C2 Generic Capacitor (4.7e-06F) Generic Capacitor (4.7e-06F) 0402 (1005 metric) No Digi-key Number 2 ?? 0 0
R1, R5 Generic Resistor (1000) Generic Resistor (1000) 0402 (1005 metric) No Digi-key Number 2 ?? 0 0
R8 Generic Resistor (1180) Generic Resistor (1180) 0402 (1005 metric) No Digi-key Number 1 ?? 0 0
U1 Li-Ion/LiPo Battery Charger (USB-friendly) Texas Instruments BQ24072RGTT 296-23813-2-ND 1 2.68 1 2.68
J2 Connector - 2mm pitch receptacle Hirose DF3A-2P-2DSA H2094-ND 1 0.18 1 0.18
D3 Orange LED Rohm Semiconductor SML-P11DTT86 0402 (1005 metric), polarized No Digi-key Number 1 ?? 0 0
D1 Green LED Rohm Semiconductor SML-P11MTT86 0402 (1005 metric), polarized No Digi-key Number 1 ?? 0 0

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